九天国际教育GCSE真题November 2013 (v3) QP - Paper 1 CIE Chemistry IGCSE

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九天国际教育GCSE真题June 2013 (v3) QP - Paper 3 CIE Chemistry IGCSE

READ THESE INSTRUCTIONS FIRSTWrite your Centre number, candidate number and name on all the work you hand in.Write in dark blue or black pen.You may use a pencil for any diagrams, graphs or rough working.Do not use staples, paper clips, highlighters, glue or correction ﬂ uid.DO NOT WRITE IN ANY BARCODES.Answer all questions.Electronic calculators may be used.A copy of the Periodic Table is printed on page 12.You may lose marks if you do not show your working or if you do not use appropriate units.At the end of the examination, fasten all your work securely together.The number of marks is given in brackets [ ] at the end of each question or part question.CHEMISTRY0620/33Paper 3 (Extended)May/June 20131 hour 15 minutesCandidates answer on the Question Paper.No Additional Materials are required.UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS International General Certiﬁ cate of Secondary EducationThis document consists of 11 printed pages and 1blank page.[Turn overIB13 06_0620_33/2RP © UCLES 2013*6258911381*For1S ubstances can be classiﬁ ed as:Examiner’sUseelements mixtures compoundsE lements can be divided into:metals non-metals(a)D eﬁ ne each of the following terms.(i)e lement.................................................................................................................................... (2)(ii)c ompound.................................................................................................................................... (2)(iii)m ixture.................................................................................................................................... (1)(b)C lassify each of the following as either an element, compound or mixture.(i)b rass (1)(ii)c arbon dioxide (1)(iii)c opper (1)(c)W hich physical property is used to distinguish between metals and non-metals?I t is possessed by all metals but by only one non-metal. (1)[Total: 9]© UCLES 20130620/33/M/J/13For2O ne of the factors which determine the reaction rate of solids is particle size.Examiner’sUse(a)A mixture of ﬁ nely powdered aluminium and air may explode when ignited.A n explosion is a very fast exothermic reaction. This causes a large and sudden increasein temperature.E xplain each of the following in terms of collisions between reacting particles.(i)W hy is the reaction between ﬁ nely powdered aluminium and air very fast?.................................................................................................................................... (2)(ii)E xplain why for most reactions the rate of reaction decreases with time..................................................................................................................................... (2)(iii)S uggest an explanation why the rate of reaction in an explosion could increase rather than decrease with time......................................................................................................................................................................................................................................................................... (3)(b)(i)G ive another example of a substance other than a metal which, when ﬁ nelypowdered, might explode when ignited in air. (1)(ii)D escribe a simple test-tube reaction which shows the effect of particle size on the rate at which a solid reacts with a solution......................................................................................................................................................................................................................................................................... (3)[Total: 11]© UCLES 2013[Turn over0620/33/M/J/130620/33/M/J/13© UCLES 2013ForExaminer’sUse3I ron from the blast furnace is impure. It contains 5% of impurities, mainly carbon, sulfur, silicon and phosphorus. Almost all of this impure iron is converted into the alloy, mild steel.(a) (i) S tate a use of mild steel. (1)(ii) N ame and give a use of another iron-containing alloy.name ..........................................................................................................................use (2)(b) T he oxides of carbon and sulfur are gases. The oxides of silicon and phosphorus are not.Explain how these impurities are removed from the impure iron when it is converted into mild steel............................................................................................................................................ ........................................................................................................................................... ........................................................................................................................................... ........................................................................................................................................... (5)[Total: 8]4G ermanium is an element in Group IV. The electron distribution of a germanium atom is 2 + 8 + 18 + 4. It has oxidation states of +2 and +4.(a) G ermanium forms a series of saturated hydrides similar to the alkanes.(i) D raw the structural formula of the hydride which contains three germanium atomsper molecule.[1](ii) P redict the general formula of the germanium hydrides. (1)0620/33/M/J/13© UCLES 2013[Turn overFor Examiner’sUse(b) D raw a diagram showing the arrangement of the valency electrons in one molecule ofthe covalent compound germanium(IV ) chloride, GeC l 4.Use o to represent an electron from a chlorine atom.Use x to represent an electron from a germanium atom.[2](c) D escribe the structure of the giant covalent compound germanium(IV ) oxide, GeO 2.I t has a similar structure to that of silicon(IV ) oxide............................................................................................................................................ ........................................................................................................................................... (3)(d) I s the change GeC l 2 to GeC l 4 reduction, oxidation or neither? Give a reason for your choice............................................................................................................................................ (2)[Total: 9]5A ll metal nitrates decompose when heated. A few form a nitrite and oxygen. Most form the metal oxide, oxygen and a brown gas called nitrogen dioxide.(a) (i) N ame a metal whose nitrate decomposes to form the metal nitrite and oxygen. (1)(ii) C omplete the equation for the action of heat on lead(II ) nitrate.......Pb(NO 3)2 → ......... + ......NO 2 + O 2 [2](iii) S uggest why the nitrate of the metal, named in (a)(i), decomposes less readily thanlead(II ) nitrate..................................................................................................................................... (2)0620/33/M/J/13© UCLES 2013For Examiner’sUse(b) A lmost all samples of nitrogen dioxide are an equilibrium mixture of nitrogen dioxide,NO 2, and dinitrogen tetroxide, N 2O 4.forward reactionreverse reactionN 2O 4(g)colourless2NO 2(g)dark brownI n the forward reaction, a bond forms between the two nitrogen dioxide molecules.NO 2 + NO 2 → O 2N – NO 2(i) E xplain the term equilibrium mixture ..................................................................................................................................... .............................................................................................................................. [1] (ii) T he syringe contains a sample of the equilibrium mixture. The plunger was pulledback reducing the pressure.H ow would the colour of the gas inside the syringe change? Give an explanation foryour answer..................................................................................................................................... .................................................................................................................................... .............................................................................................................................. [3] (iii) A sealed tube containing an equilibrium mixture of nitrogen dioxide and dinitrogentetroxide was placed in a beaker of ice cold water. T he colour of the mixture changed from brown to pale yellow.I s the forward reaction exothermic or endothermic? Give an explanation for your choice..................................................................................................................................... (2)(iv) W hat other piece of information given in the equation supports your answer to (iii)?NO 2 + NO 2 → O 2N–NO 2 (1)[Total: 12]0620/33/M/J/13© UCLES 2013[Turn overForExaminer’sUse6S ulfuric acid and malonic acid are both dibasic acids. One mole of a dibasic acid can form two moles of hydrogen ions.H 2SO 4 → 2H + + SO 42–D ibasic acids can form salts of the type Na 2X and CaX.(a) M alonic acid is a white crystalline solid which is soluble in water. It melts at 135 °C.T he structural formula of malonic acid is given below. It forms salts called malonates.CH 2(COOH)2 or HOOC – CH 2 – COOH(i) H ow could you determine if a sample of malonic acid is pure?technique used .......................................................................................................... result if pure (2)(ii) W hat is the molecular formula of malonic acid? (1)(iii) W hen malonic acid is heated there are two products, carbon dioxide and a simplercarboxylic acid. Deduce the name and molecular formula of this acid..................................................................................................................................... .............................................................................................................................. [2] (iv) M alonic acid reacts with ethanol to form a colourless liquid which has a ‘fruity’ smell.I ts structural formula is given below.CC OOO OCH2CH 2CH 3CH 2CH 3W hat type of compound contains the group which is circled? (1)0620/33/M/J/13© UCLES 2013For Examiner’sUse(b) (i) S uggest why a solution of malonic acid, concentration 0.2 mol / dm 3, has a higher pHthan one of sulfuric acid of the same concentration. (1)(ii) D escribe a test, other than measuring pH, which can be carried out on both acidsolutions to con ﬁ rm the explanation given in (b)(i) for the different pH values of the two acids..................................................................................................................................... (2)(c) C omplete the following equations for reactions of these two acids.(i) sodium hydroxide + malonic acid → .................... + ....................[1].................... (ii) CuO + H 2SO 4 → .................... + .................... [2] (iii) Mg + CH 2(COOH)2 → .................... + ....................[2](iv) K 2CO 3 + H 2SO 4 → .................... + .................... + ....................[2][Total: 16]7 A lkanes and alkenes are both series of hydrocarbons.(a) (i) E xplain the term hydrocarbon ..................................................................................................................................... (1)(ii) W hat is the difference between these two series of hydrocarbons?.................................................................................................................................... (2)(b) A lkenes and simpler alkanes are made from long-chain alkanes by cracking.C omplete the following equation for the cracking of the alkane C 20H 42.C 20H 42 → 2C 4H 8 + 2C 2H 4 + ...............[1]0620/33/M/J/13© UCLES 2013[Turn overForExaminer’sUse(c) Alkenes such as butene and ethene are more reactive than alkanes.A lkenes are used in the petrochemical industry to make a range of products, which includes polymers and alcohols.(i) D ibromoethane is used as a pesticide. Complete the equation for its preparationfrom ethene.C C + Br 2 →HHH H[1](ii) T he structural formula of a poly(alkene) is given below.nC CH 3C CH 3HHD educe the structural formula of its monomer.[2](iii) H ow is butanol made from butene, CH 3 – CH 2 – CH = CH 2? Include an equation in your answer..................................................................................................................................... (2)(iv)C racking changes alkanes into alkenes. How could an alkene be converted into analkane? Include an equation in your answer..................................................................................................................................... (2)0620/33/M/J/13© UCLES 2013ForExaminer’sUse(d) 20 cm 3 of a hydrocarbon was burnt in 175 cm 3 of oxygen. After cooling, the volume ofthe remaining gases was 125 cm 3. The addition of aqueous sodium hydroxide removed carbon dioxide leaving 25 cm 3 of unreacted oxygen.(i) v olume of oxygen used = .......... cm 3 [1] (ii) v olume of carbon dioxide formed = .......... cm 3 [1](iii) D educe the formula of the hydrocarbon and the balanced equation for the reaction..................................................................................................................................... .................................................................................................................................... .................................................................................................................................... (2)[Total: 15]11BLANK PAGEPMT12Permission to reproduce items where third-party owned material protected by copyright is included has been sought and cleared where possible. Every reasonable effort has been made by the publisher (UCLES) to trace copyright holders, but if any items requiring clearance have unwittingly been included the publisher will be pleased to make amends at the earliest possible opportunity.University of Cambridge International Examinations is part of the Cambridge Assessment Group. Cambridge Assessment is the brand name of University of Cambridge Local Examinations Syndicate (UCLES), which is itself a department of the University of Cambridge.G ro u p140C eC e r i u m 58141P rP r a s e o d y m i u m 59144N d N e o d y m i u m 60P mP r o m e t h i u m61150S mS a m a r i u m62152E uE u r o p i u m63157G dG a d o l i n i u m64159T bT e r b i u m65162D yD y s p r o s i u m66165H oH o l m i u m67167E rE r b i u m68169T mT h u l i u m69173Y bY t t e r b i u m70175L uL u t e t i u m71232T hT h o r i u m 90P aP r o t a c t i n i u m 91238UU r a n i u m92N pN e p t u n i u m93P uP l u t o n i u m94A mA m e r i c i u m95C mC u r i u m96B kB e r k e l i u m97C fC a l i f o r n i u m98E sE i n s t e i n i u m99F mF e r m i u m100M dM e n d e l e v i u m101N oN o b e l i u m102L rL a w r e n c i u m1031HH y d r o g e n17L iL i t h i u m 323N aS o d i u m 1124M gM a g n e s i u m1240C aC a l c i u m 2045S c S c a n d i u m 2148T i T i t a n i u m2251V V a n a d i u m 2352C r C h r o m i u m 2455M n M a n g a n e s e 2556F e I r o n 2659C o C o b a l t 2759N i N i c k e l 2864C u C o p p e r 2965Z nZ i n c3070G aG a l l i u m3127A lA l u m i n i u m1311B B o r o n 512C C a r b o n614NN i t r o g e n716OO x y g e n819FF l u o r i n e928S iS i l i c o n1431PP h o s p h o r u s1532SS u l f u r1635.5C lC h l o r i n e1740A rA r g o n1820N eN e o n104H eH e l i u m273G eG e r m a n i u m3275A sA r s e n i c3379S eS e l e n i u m3480B rB r o m i n e3584K rK r y p t o n3639KP o t a s s i u m 1988S rS t r o n t i u m 3889Y Y t t r i u m 3991Z r Z i r c o n i u m4093N b N i o b i u m 4196M o M o l y b d e n u m 42T c T e c h n e t i u m 43101R u R u t h e n i u m 44103R h R h o d i u m 45106P d P a l l a d i u m 46108A gS i l v e r47112C dC a d m i u m48115I nI n d i u m49119S nT i n50122S bA n t i m o n y51128T eT e l l u r i u m52127II o d i n e53131X eX e n o n54137B aB a r i u m 56139L a L a n t h a n u m 57*178H fH a f n i u m72181T a T a n t a l u m 73184W T u n g s t e n 74186R e R h e n i u m 75190O s O s m i u m 76192I rI r i d i u m 77195P t P l a t i n u m78197A uG o l d79201H gM e r c u r y80204T lT h a l l i u m81207P bL e a d82209B iB i s m u t h83P oP o l o n i u m84A tA s t a t i n e85R nR a d o n86F rF r a n c i u m 87227A cA c t i n i u m899B eB e r y l l i u m4II I I I II V V V I V I I 085R bR u b i d i u m 37133C sC a e s i u m 55226R a R a d i u m 88T h e v o l u m e o f o n e m o l e o f a n y g a s i s 24d m 3a t r o o m t e m p e r a t u r e a n d p r e s s u r e (r .t .p .).a Xb a = r e l a t i v e a t o m ic m a s sX = a t o m i c s y m b o lb = p r o t o n (a t o m ic ) n u m b e rK e y *58-71 L a n t h a n o i d s e r i e s 90-103 A c t i n o i d s e r i e s D A T A S H E E T T h e P e r i o d i c T a b l e o f t h e E l e m e n t sPMT。

九天国际教育GCSE真题June 2013 (R) QP - Paper 1C Edexcel Chemistry IGCSE

Turn overP43317A ©2013 Pearson Education Ltd.1/1/1/1/*P43317A0136*Instructionst Use black ink or ball-point pen.t Fill in the boxes at the top of this page with your name,centre number and candidate number.t Answer all questions.t A nswer the questions in the spaces provided– there may be more space than you need.t Show all the steps in any calculations and state the units.tInformationt The total mark for this paper is 120.t T he marks for each question are shown in brackets – use this as a guide as to how much time to spend on each question.Advicet Read each question carefully before you start to answer it.t Keep an eye on the time.t Write your answers neatly and in good English.t Try to answer every question.t Check your answers if you have time at the end.2*P43317A0236*3*P43317A0336*Turn overBLANK PAGE4*P43317A0436*5*P43317A0536*Turn over(c) State which one of the gases in the table is used in(i) the manufacture of ammonia(1)....................................................................................................................................................................................................................................................................................(ii) the manufacture of fire extinguishers(1)....................................................................................................................................................................................................................................................................................(iii) the manufacture of fizzy drinks(1)....................................................................................................................................................................................................................................................................................(Total for Question 1 = 8 marks)6*P43317A0636*7*P43317A0736*Turn over(c) The Taj Mahal is a famous building in India. It is made out of a form of calcium carbonatecalled marble.The appearance of the marble has changed gradually over the years because of the effects of sulfur dioxide in the atmosphere.Describe how sulfur dioxide has caused this change in appearance.(3)................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................(Total for Question 2 = 6 marks)8*P43317A0836*9*P43317A0936*Turn over10*P43317A01036*(c) The ionic half-equation for the reaction at the negative electrode isAl3+ + 3e–o AlWhat type of reaction is occurring at the negative electrode?Explain your answer.(2) .................................................................................................................................................................................................................................................................................... .................................................................................................................................................................................................................................................................................... .................................................................................................................................................................................................................................................................................... ....................................................................................................................................................................................................................................................................................(d) The waste gases escaping from the electrolysis cell contain carbon dioxide.Describe how the carbon dioxide is formed.(2) .................................................................................................................................................................................................................................................................................... .................................................................................................................................................................................................................................................................................... .................................................................................................................................................................................................................................................................................... ....................................................................................................................................................................................................................................................................................(e) Aluminium is used to make cans for food and drinks.State two properties of aluminium that make it suitable for this use.You should not refer to cost in your answers.(2)1 ................................................................................................................................................................................................................................................................................2 ................................................................................................................................................................................................................................................................................(Total for Question 4 = 10 marks)(c) Heptane belongs to a homologous series of compounds called alkanes. The general formula of the alkanes is C n H 2n+2(i) Heptene belongs to a homologous series of compounds called alkenes.Give the general formula of the alkenes.(1)....................................................................................................................................................................................................................................................................................(ii) Complete the following diagram to show the structural formula of heptene (C 7H 14)by inserting lines to represent the covalent bonds between the carbon atoms.(2)C C C C C C C HHHHHHHHHHHHHH(d) When heptene is added to bromine water, and the mixture is shaken, a reaction occurs.State the type of reaction and give the colour of the bromine water before and after the reaction with heptene.(3)Type of reaction ........................................................................................................................................................................................................................................Colour before ..............................................................................................................................................................................................................................................Colour after ...................................................................................................................................................................................................................................................(e) Explain, in terms of the bonds present, why heptane is described as saturated andheptene as unsaturated.(2)................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................(Total for Question 5 = 11 marks)BLANK PAGE(c) Chlorine can be used to obtain bromine (Br2)from sea water.Sea water contains bromide ions, Br—The pH of sea water is usually within the range of 7.5 to 8.4The stages in the extraction of bromine from sea water areStage 1 T he pH of the sea water is lowered to about 3.5Stage 2 A n excess of chlorine is bubbled through the sea waterStage 3 T he bromine (Br2)is removed from the mixture and reacted withsulfur dioxide (SO2) and water. This reaction converts the bromine tohydrogen bromide (HBr) and sulfuric acid (H2SO4)Stage 4 T he hydrogen bromide is reacted with chlorine to form bromine (Br2)(i) Suggest a substance that could be added to lower the pH of sea water in Stage 1.(1) ....................................................................................................................................................................................................................................................................................(ii) Why is an excess of chlorine added in Stage 2?(1) ....................................................................................................................................................................................................................................................................................(iii) Write a chemical equation for the reaction in Stage 3.(2) ....................................................................................................................................................................................................................................................................................(iv) Write a chemical equation for the reaction in Stage 4.(1) ....................................................................................................................................................................................................................................................................................(d) State the colour change observed when bromine is added to an aqueous solutionof potassium iodide.(2) Colour of potassium iodide solution at start .............................................................................................................................................................. Colour of final reaction mixture...............................................................................................................................................................................................(Total for Question 6 = 16 marks)BLANK PAGEA andB represent experiments using the same concentration of(i) Experimentshydrochloric acid but at different temperatures.Which letter represents the experiment at the higher temperature?Give a reason for your choice.(2)Letter .................................................................................................................................................................................................................................................................. Reason .............................................................................................................................................................................................................................................................. .................................................................................................................................................................................................................................................................................... ....................................................................................................................................................................................................................................................................................B andC represent experiments at the same temperatures and(ii)Experimentsusing the same volumes of hydrochloric acid.The concentration of hydrochloric acid used in experiment B is 0.20 mol/dm3.What is the concentration of hydrochloric acid used in experiment C?Explain how you worked out your answer.(2) Concentration ........................................................................................................................................................................................................................................... Explanation .................................................................................................................................................................................................................................................. .................................................................................................................................................................................................................................................................................... ....................................................................................................................................................................................................................................................................................(iii) Explain why increasing the concentration has this effect on the rate of reaction.(3) .................................................................................................................................................................................................................................................................................... .................................................................................................................................................................................................................................................................................... .................................................................................................................................................................................................................................................................................... .................................................................................................................................................................................................................................................................................... .................................................................................................................................................................................................................................................................................... ....................................................................................................................................................................................................................................................................................(Total for Question 7 = 16 marks)8 A student was asked by his teacher to perform a flame test on a solid.He used this method.x dip the tip of a clean platinum wire into hydrochloric acid and then into the solidx adjust the air hole of the Bunsen burner to obtain a non-roaring, non-luminous Bunsen flamex place the tip of the platinum wire into the edge of the flamex observe the colour in the flame(a) (i) Why is it important that the platinum wire is clean?(1) .................................................................................................................................................................................................................................................................................... ....................................................................................................................................................................................................................................................................................(ii) Why is it important to use a non-luminous flame?(1) .................................................................................................................................................................................................................................................................................... ....................................................................................................................................................................................................................................................................................(iii) What colour would be observed in the flame if the solid contained sodium ions?(1) ....................................................................................................................................................................................................................................................................................(b) A student poured a solution containing 0.010mol of hydrochloric acid into a beaker.He then added 0.0075mol of zinc powder and collected the hydrogen given off ina gas syringe.The equation for the reaction isZn(s) + 2HCl(aq) o ZnCl2(aq) + H2(g)Is the zinc or the hydrochloric acid in excess? Explain your answer.(2) .................................................................................................................................................................................................................................................................................... .................................................................................................................................................................................................................................................................................... ....................................................................................................................................................................................................................................................................................(c) The student repeated the experiment with 0.0075mol of magnesium powderwith the same total surface area as the zinc.The equation for the reaction isMg(s) + 2HCl(aq) o MgCl2(aq) + H2(g)(i) What effect would this change have on the rate at which the hydrogen isgiven off?(1) .................................................................................................................................................................................................................................................................................... .................................................................................................................................................................................................................................................................................... ....................................................................................................................................................................................................................................................................................(ii) What effect would this change have on the volume of hydrogen produced?(1) .................................................................................................................................................................................................................................................................................... .................................................................................................................................................................................................................................................................................... ....................................................................................................................................................................................................................................................................................(Total for Question 9 = 9 marks)(iii) What happens to the unreacted nitrogen and hydrogen?(1)....................................................................................................................................................................................................................................................................................(d) The reaction would be faster if a higher temperature were used.Suggest why a higher temperature is not used in the Haber process.(1)............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................(e) The equation for the formation of ammonia isN 2(g) + 3H 2(g) U 2NH 3(g)(i) Calculate the amount, in moles, of ammonia, that could be formed in theHaber process from 112 kilograms of nitrogen, assuming all the nitrogen is converted into ammonia.(3)Amount of ammonia =....................................................... mol(ii) Only 15% of the nitrogen is converted into ammonia.Calculate the actual amount, in moles, of ammonia that is formed from 112 kilograms of nitrogen.(1)Amount of ammonia =....................................................... mol (Total for Question 10 = 15 marks)31*P43317A03136*Turn over32*P43317A03236*33*P43317A03336*BLANK PAGE34*P43317A03436*35*P43317A03536*BLANK PAGEBLANK PAGE36*P43317A03636*。

九天国际教育GCSE真题November 2010 (v3) QP - Paper 5 CIE Chemistry IGCSE

九天国际教育GCSE真题November 2016 (v3) QP - Paper 4 CIE Chemistry IGCSE

READ THESE INSTRUCTIONS FIRSTWrite your Centre number, candidate number and name on all the work you hand in.Write in dark blue or black pen.You may use an HB pencil for any diagrams or graphs.Do not use staples, paper clips, glue or correction fluid.DO NOT WRITE IN ANY BARCODES.Answer all questions.Electronic calculators may be used.A copy of the Periodic Table is printed on page 12.You may lose marks if you do not show your working or if you do not use appropriate units.At the end of the examination, fasten all your work securely together.The number of marks is given in brackets [ ] at the end of each question or part question.CHEMISTRY0620/43Paper 4 Theory (Extended)October/November 20161 hour 15 minutesCandidates answer on the Question Paper.No Additional Materials are required.Cambridge International ExaminationsCambridge International General Certificate of Secondary EducationThis document consists of 12 printed pages.[Turn overIB16 11_0620_43/4RP © UCLES 2016The syllabus is approved for use in England, Wales and Northern Ireland as a Cambridge International Level 1/Level 2 Certificate.0620/43/O/N/16© UCLES 20161(a) C omplete the table.particle charge relative massproton +1neutron 1electron[2](b) T he following are isotopes of carbon.C 126 C 136 C146 (i) I n terms of numbers of protons, neutrons and electrons, how are these three isotopes thesame and how are they different?T hey are the same because ............................................................................................... .............................................................................................................................................T hey are different because ................................................................................................. .............................................................................................................................................[3] (ii) W hy do all isotopes of carbon have the same chemical properties? (1)(c) N ame two forms of the element carbon which have giant covalent structures............................................................... and ........................................................................ [1] (d) C omplete the diagram to show the electron arrangement in a carbon dioxide molecule.S how the outer shell electrons only.O CO[2][Total: 9]2B eryllium is a metallic element in Group II.(a)G ive the electronic structure of a beryllium atom. (1)(b)G ive the formula of beryllium oxide. (1)(c)(i) D escribe the bonding in a metallic element such as beryllium.I nclude a labelled diagram and any appropriate charges in your answer........................................................................................................................................................................................................................................................................................... (3)(ii)E xplain why metallic elements, such as beryllium, are good conductors of electricity.............................................................................................................................................. (1)(d)B eryllium hydroxide is amphoteric.B eryllium hydroxide reacts with acids. The salts formed contain positive beryllium ions.(i)G ive the formula of the positive beryllium ion. (1)(ii)W rite a chemical equation for the reaction between beryllium hydroxide and hydrochloric acid. (2)(iii)B eryllium hydroxide also reacts with alkalis. The salts formed contain beryllate ions, BeO2–.2S uggest a chemical equation for the reaction between beryllium hydroxide andsodium hydroxide solution. (2)[Total: 11]© UCLES 2016[Turn over0620/43/O/N/163W hen lead(II) nitrate is heated, two gases are given off and solid lead(II) oxide remains.T he equation for the reaction is shown.2Pb(NO3)2(s) → 2PbO(s) + 4NO2(g) + O2(g)(a)C alculate the Mrof lead(II) nitrate. (1)(b)6.62 g of lead(II) nitrate are heated until there is no further change in mass.(i)C alculate the mass of lead(II) oxide produced............................ g [2](ii)C alculate the volume of oxygen, O2, produced at room temperature and pressure (r.t.p.)............................ dm3 [2](c)D escribe a test for oxygen.t est .............................................................................................................................................r esult ..........................................................................................................................................[2]0620/43/O/N/16© UCLES 2016(d)L ead(II) oxide is insoluble. A student adds solid lead(II) oxide to dilute nitric acid until thelead(II) oxide is in excess. Aqueous lead(II) nitrate and water are produced.(i)W hat is meant by the term excess? (1)(ii)H ow would the student know when the lead(II) oxide is in excess? (1)(iii)W rite a chemical equation for the reaction. (1)[Total: 10]© UCLES 2016[Turn over0620/43/O/N/164S ilicon(IV) oxide and sodium chloride have different types of bonding and structure.(a)N ame the type of bonding present ins ilicon(IV) oxide, .......................................................................................................................s odium chloride. ........................................................................................................................[2](b)N ame the type of structure present in silicon(IV) oxide. (1)(c) (i)S ilicon(IV) oxide has a high melting point. Explain why.............................................................................................................................................. (2)(ii)S ilicon(IV) oxide is a poor conductor of electricity. Explain why. (1)(d)S olid sodium chloride does not conduct electricity. However, it conducts electricity when molten.E xplain why solid sodium chloride does not conduct electricity, whereas molten sodium chloridedoes conduct electricity............................................................................................................................................................................................................................................................................................................................................................................................................................................................. (3)(e)A concentrated aqueous solution of sodium chloride is electrolysed using carbon electrodes.(i)N ame the products formed at the electrodes.p roduct at the positive electrode (anode) ...........................................................................p roduct at the negative electrode (cathode) .......................................................................[2](ii)W rite an ionic half-equation for the reaction occurring at the negative electrode. (1)© UCLES 20160620/43/O/N/16(f)A dilute aqueous solution of sodium chloride is electrolysed using carbon electrodes.N ame the main product formed at the positive electrode. (1)(g)M olten sodium chloride is electrolysed using carbon electrodes.(i)N ame the product formed at the negative electrode. (1)(ii)Write an ionic half-equation for the reaction occurring at the negative electrode. (1)(iii)C hlorine is produced at the positive electrode.G ive the test for chlorine.test ......................................................................................................................................result ...................................................................................................................................[2][Total: 17]© UCLES 2016[Turn over0620/43/O/N/165S ulfuric acid can be manufactured from the raw materials sulfur, air and water. The process can be divided into four stages.s tage 1converting sulfur into sulfur dioxides tage 2converting sulfur dioxide into sulfur trioxides tage 3converting sulfur trioxide into oleum, H2S2O7s tage 4converting oleum into sulfuric acidstage 1(a) (i)D escribe how sulfur is converted into sulfur dioxide. (1)(ii)W rite a chemical equation for the conversion of sulfur into sulfur dioxide. (1)stage 2(b)S ulfur dioxide is converted into sulfur trioxide according to the following equation.2SO2 + O22SO3T he reaction is carried out at a temperature of 450 °C and a pressure of 1–2 atmospheres using a catalyst. The energy change, ∆H, for the reaction is –196 kJ / mol.(i)W hat is the meaning of the symbol ? (1)(ii)N ame the catalyst used in this reaction. (1)(iii)W hy is a catalyst used? (1)(iv)I f a temperature higher than 450 °C were used, what would happen to the amount of sulfur trioxide produced? Give a reason for your answer.............................................................................................................................................. (2)(v)S uggest a reason why a temperature lower than 450 °C is not used.............................................................................................................................................. (1)0620/43/O/N/16© UCLES 2016(vi)I f a pressure higher than 1–2 atmospheres were used, what would happen to the amount of sulfur trioxide produced? Give a reason for your answer.............................................................................................................................................. (2)stage 3(c) (i)W hat is added to sulfur trioxide to convert it into oleum? (1)(ii)W rite a chemical equation for the conversion of sulfur trioxide into oleum. (1)stage 4(d) (i)W hat is added to oleum to convert it into sulfuric acid? (1)(ii)W rite a chemical equation for the conversion of oleum into sulfuric acid. (1)(e)G ive one use of sulfuric acid. (1)(f)S ulfuric acid reacts with a hydrocarbon called benzene to produce benzenesulfonic acid,C6H5SO3H. Benzenesulfonic acid is a strong acid which ionises to produce hydrogen ions, H+,and benzenesulfonate ions, C6H5SO3–.(i)W hat is meant by the term strong acid? (1)(ii)D escribe how to show that a 1 mol / dm3 solution of benzenesulfonic acid is a strong acid.............................................................................................................................................. (2)(iii)W rite a chemical equation for the reaction between benzenesulfonic acid andsodium carbonate, Na2CO3. (2)[Total: 20]0620/43/O/N/16© UCLES 2016[Turn over0620/43/O/N/16© UCLES 20166 S ynthetic polyamides are made by condensation polymerisation. (a) (i) W hat is meant by the term condensation polymerisation ?............................................................................................................................................. ............................................................................................................................................. ....................................................................................................................................... [3] (ii) Name another type of polymerisation. (1)(b) O ne repeat unit of a synthetic polyamide is represented by the following structure.(i) D raw a ring around the amide link.[1](ii) C omplete the diagrams to show the structures of the monomers used to produce thesynthetic polyamide. Show all the missing atoms and bonds.[2](iii) N ame an example of a synthetic polyamide. (1)(c) P roteins and synthetic polyamides have similarities and differences.(i) N ame the type of compounds that are the monomers used to make up proteins. (1)110620/43/O/N/16© UCLES 2016Permission to reproduce items where third-party owned material protected by copyright is included has been sought and cleared where possible. Every reasonableeffort has been made by the publisher (UCLES) to trace copyright holders, but if any items requiring clearance have unwittingly been included, the publisher will be pleased to make amends at the earliest possible opportunity.To avoid the issue of disclosure of answer-related information to candidates, all copyright acknowledgements are reproduced online in the Cambridge International Examinations Copyright Acknowledgements Booklet. This is produced for each series of examinations and is freely available to download at after the live examination series.Cambridge International Examinations is part of the Cambridge Assessment Group. Cambridge Assessment is the brand name of University of Cambridge Local Examinations Syndicate (UCLES), which is itself a department of the University of Cambridge.(ii) S tarting with a sample of protein, describe how to produce, separate, detect and identifythe monomers which make it up.Your answer should include • t he name of the process used to break down the protein into its monomers, • t he name of the process used to separate the monomers, • t he method used to detect the monomers after they have been separated, • t he method used to identify the monomers after they have been separated.............................................................................................................................................. ............................................................................................................................................. ............................................................................................................................................. ............................................................................................................................................. (4)[Total: 13]PMT120620/43/O/N/16© UCLES 2016G r o u pT h e P e r i o d i c T a b l e o f E l e m e n t s1Hh y d r o g e n12H eh e l i u m4I I I I I II V V V I V I I V I I I3L il i t h i u m 74B eb e r y l l i u m 9a t o m ic n u m b e ra t o m i c s y mb o l K e yn a m er e l a t i v e a t o m i c m a s s 11N as o d i u m 2312M gm a g n e s i u m2419Kp o t a s s i u m 3920C ac a l c i u m 4037R br u b i d i u m 8538S rs t r o n t i u m 8855C sc a e s i u m 13356B ab a r i u m 13787F rf r a n c i u m –88R ar a d i u m –5B b o r o n 1113A l a l u m i n i u m 2731G a g a l l i u m7049I ni n d i u m11581T lt h a l l i u m2046C c a r b o n 1214S i s i l i c o n2832G eg e r m a n i u m7350S nt i n11982P bl e a d20722T i t i t a n i u m 4840Z r z i r c o n i u m 9172H f h a f n i u m 178104R f r u t h e r f o r d i u m –23V v a n a d i u m5141N b n i o b i u m9373T a t a n t a l u m181105D b d u b n i u m–24C r c h r o m i u m 5242M o m o l y b d e n u m 9674W t u n g s t e n 184106S g s e a b o r g i u m –25M n m a n g a n e s e 5543T c t e c h n e t i u m –75R e r h e n i u m 186107B h b o h r i u m –26F e i r o n 5644R u r u t h e n i u m 10176O so s m i u m 190108H s h a s s i u m –27C o c o b a l t 5945R h r h o d i u m 10377I r i r i d i u m 192109M t m e i t n e r i u m –28N i n i c k e l 5946P d p a l l a d i u m 10678P t p l a t i n u m 195110D s d a r m s t a d t i u m–29C u c o p p e r 6447A g s i l v e r 10879A ug o l d197111R gr o e n t g e n i u m–30Z n z i n c 6548C dc ad m i u m11280H gm e r c u r y201112C nc o p e r n i c i u m–114F lf l e r o v i u m–116L vl i v e r m o r i u m–7N n i t r o g e n1415Pp h o s p h o r u s3133A sa r s e n i c7551S ba n t i m o n y12283B ib i s m u t h2098Oo x y g e n1616Ss u l f u r3234S es e l e n i u m7952T et e l l u r i u m12884P op o l o n i u m–9Ff l u o r i n e1917C lc h l o r i n e35.535B rb r o m i n e8053Ii o d i n e12785A ta s t a t i n e–10N en e o n2018A ra r g o n4036K rk r y p t o n8454X ex e n o n13186R nr a d o n–21S c s c a n d i u m 4539Y y t t r i u m 8957–71l a n t h a n o i d s89–103a c t i n o i d s57L al a n t h a n u m 13989A cl a n t h a n o i d sa c t i n o i d sT h e v o l u m e o f o n e m o l e o f a n y g a s i s 24 d m 3 a t r o o m t e m p e r a t u r e a n d p r e s s u r e (r .t .p .).a c t i n i u m –58C e c e r i u m 14090T h t h o r i u m 23259P r p r a s e o d y m i u m14191P a p r o t a c t i n i u m23160N d n e o d y m i u m 14492U u r a n i u m 23861P m p r o m e t h i u m –93N p n e p t u n i u m–62S m s a m a r i u m15094P up l u t o n i u m–63E ue u r o p i u m15295A ma m e r i c i u m–64G dg a d o l i n i u m15796C mc u r i u m–65T bt e r b i u m15997B kb e r k e l i u m–66D yd y s p r o s i u m16398C fc a l i f o r n i um–67H oh o l m i u m16599E se i n s t e i n i u m–68E re r b i u m167100F mf e r m i u m–69T mt h u l i u m169101M dm e n d e l e v i u m–70Y by t t e r b i u m173102N on o b e l i u m–71L ul u t e t i u m175103L rl a w r e n c i u m–PMT。

九天国际教育GCSE真题June 2012 QP - Unit 2 (F) OCR Chemistry (A) GCSE

INSTRUCTIONS TO CANDIDATES •Write your name, centre number and candidate number in the boxes above. Please write clearly and in capital letters.• Use black ink. HB pencil may be used for graphs and diagrams only.• Answer all the questions.• Read each question carefully. Make sure you know what you have to do before startingyour answer.• Write your answer to each question in the space provided. Additional paper may beused if necessary but you must clearly show your candidate number, centre number and question number(s).• Do not write in the bar RMATION FOR CANDIDATES • Y our quality of written communication is assessed in questions marked with a pencil ( ).• The number of marks is given in brackets [ ] at the end of each question or part question.• The total number of marks for this paper is 60.• This document consists of 24 pages. Any blank pages are indicated.• The Periodic T able is printed on the back page.•A list of qualitative tests for ions is printed on page 2.OCR is an exempt CharityTurn over© OCR 2012 [R/601/7592]DC (SHW 00678 4/11) 49642/4*A 135360612*© OCR 2012TWENTY FIRST CENTURY SCIENCE DATA SHEETQualitative analysisTests for ions with a positive chargeIonTestObservationcalcium Ca 2+add dilute sodium hydroxidea white precipitate forms; the precipitate does not dissolve in excess sodium hydroxide copper Cu 2+add dilute sodium hydroxidea light blue precipitate forms; the precipitate does not dissolve in excess sodium hydroxide iron(II )Fe 2+add dilute sodium hydroxidea green precipitate forms; the precipitate does not dissolve in excess sodium hydroxide iron(III )Fe 3+add dilute sodium hydroxidea red-brown precipitate forms; the precipitate does not dissolve in excess sodium hydroxide zinc Zn 2+add dilute sodium hydroxidea white precipitate forms; the precipitate dissolves in excess sodium hydroxideTests for ions with a negative chargeIonTestObservationcarbonate CO 32−add dilute acidthe solution effervesces; carbon dioxide gas is produced (the gas turns lime water from colourless to milky)chloride C l −add dilute nitric acid,then add silver nitrate a white precipitate forms bromide Br −add dilute nitric acid,then add silver nitrate a cream precipitate forms iodide I −add dilute nitric acid,then add silver nitrate a yellow precipitate formssulfate SO 42−add dilute acid,then add barium chloride or barium nitratea white precipitate formsBLANK PAGEQuestion 1 begins on page 4PLEASE DO NOT WRITE ON THIS PAGETurn over © OCR 2012Answer all the questions.1 Joe watches a DVD that shows how some Group 7 elements react with iron.Joe makes some notes about what he sees.fluorineF Most reactive element in the group. Explosive reaction with iron.chlorineC l Very bright flame, iron burns away quickly.bromineBr Less bright flame, takes longer for reaction with iron to finish.iodineIastatineAt(a)What do Joe’s notes show about the trend in reactivity down Group 7?................................................................................................................................................... (1)(b)The presenter on the DVD talks about the results of the experiments.(i) Use Joe’s notes to predict the reactivity of iodine and astatine............................................................................................................................................ (2)© OCR 2012(ii) Joe writes this in his notes.I think that these results show that the top element in every groupin the Periodic Table is the most reactive.Do you agree with Joe? Explain your answer.................................................................................................................................................................................................................................................................................................................................................................................................................................. (2)[Total: 5]Turn over© OCR 20122 The table shows data about the physical properties of some elements.Element Appearance atroom temperature Melting pointin °CBoiling pointin °CDoes the elementconduct electricity?Chlorine green gas–101–34noBromine red-brown liquid–7 59noIodine dark grey solid114184noLithium shiny solid1801342yesSodium shiny solid97.8883yesPotassium shiny solid63.5759yesMendeleev put these elements into two groups in the Periodic T able.He used their similarities and differences to put lithium, sodium and potassium in one group.He put chlorine, bromine and iodine into another group.Discuss which data in the table support, and which data do not support, Mendeleev’s idea of organising these elements into the two groups.T he quality of written communication will be assessed in your answer. .......................................................................................................................................................... .......................................................................................................................................................... .......................................................................................................................................................... .......................................................................................................................................................... .......................................................................................................................................................... .......................................................................................................................................................... .......................................................................................................................................................... .......................................................................................................................................................... .......................................................................................................................................................... .. (6)[Total: 6]© OCR 2012Turn over© OCR 20123The diagram shows the arrangement of electrons in an atom of lithium and an atom of fluorine.lithiumfluorine(a) The electron arrangement of the lithium atom is 2.1.What is the electron arrangement of the fluorine atom?electron arrangement = (1)(b) Sodium has eleven electrons.Complete the diagram to show the arrangement of all of the electrons in a sodium atom.sodium[1](c) Another element is in the same group of the Periodic T able as fluorine. It has the electron arrangement 2.8.7. What is the name of this element?Use the Periodic T able to help you.name of element (1)(d) Give the names of the two particles found in the nucleus of an atom...................................................................and . (1)[Total: 4]4 Eve does an experiment with chlorine.She reacts chlorine with a metal. The reaction makes sodium chloride.(a)(i) Write a word equation for the reaction. (2)Before Eve does her experiment, she looks at the hazard warning sign for chlorine gas.(ii)Eve needs to use safety precautions when she uses chlorine in her experiment.Describe these safety precautions and explain why they are necessary............................................................................................................................................ (2)Sea salt contains both sodium chloride and potassium chloride.(b)Which of the following statements about potassium chloride are true and which are false?Put a tick (✓) in the correct box for each statement.true falsePotassium chloride gives a coloured flame in a flame test.Potassium chloride is a gas.Potassium chloride can be made by reacting potassium with bromine.Solid potassium chloride contains sodium ions and chloride ions.[2][Total: 6]© OCR 2012BLANK PAGEQuestion 5 begins on page 10PLEASE DO NOT WRITE ON THIS PAGETurn over © OCR 2012© OCR 20125Amy and Zak test samples of the same solution of a salt.AmyZakThey do tests to identify the positive metal ions and the negative ions in the solution. They use a fresh sample for each test.They both use dilute sodium hydroxide and dilute silver nitrate to test the solution.The boxes show the tests they use and their notes.Amy’s notesTests NotesTest 1Add a few drops of dilute sodium hydroxide.I think thesolution contains calcium ions.Test 2Acidify and add dilute silver nitrate.I think thesolution contains chloride ions.My conclusionThe solution contains calcium chloride .Zak’s notesTests NotesTest 1Add a few drops of dilute sodium hydroxide……then add more dilute sodium hydroxide.I think thesolution contains zinc ions.Test 2Acidify and add dilute silver nitrate.I think thesolution contains chloride ions.My conclusionThe solution contains zinc chloride .Amy and Zak both agree that the salt is a chloride but disagree about the metal ion in the salt. Use the data sheet on page 2 to help you work out what Amy and Zak saw when they did the tests. Explain how what they saw led them to their conclusions and who is more likely to be correct.T he quality of written communication will be assessed in your answer. .......................................................................................................................................................... .......................................................................................................................................................... .......................................................................................................................................................... .......................................................................................................................................................... .......................................................................................................................................................... .......................................................................................................................................................... .......................................................................................................................................................... .......................................................................................................................................................... .......................................................................................................................................................... .. (6)[Total: 6]6 Massicot is a mineral. It contains lead oxide, PbO.Lead metal is extracted from massicot. Lead is needed for roofing and car batteries.Jed and Kay live near a lead mine.The mass of lead that can be extracted from massicot can be worked out using relative atomic (a)masses.(i) Use the Periodic T able to find the relative atomic masses of lead and oxygen.relative atomic mass of lead = .....................relative atomic mass of oxygen = (1)(ii) Use your answers to work out the relative formula mass of lead oxide, PbO.relative formula mass of PbO = (1)The lead mine produces millions of tonnes of lead ore.(b)Jed and Kay are talking about the advantages and disadvantages of living near the lead mine.(i) Kay has just moved into the area. She has a young family.Give one advantage and one disadvantage to Kay of living near a lead mine....................................................................................................................................................................................................................................................................................... (2)(ii) Jed and Kay talk about lead processing at the mine.Suggest reasons that Kay could give for not closing the mine.................................................................................................................................................................................................................................................................................................................................................................................................................................. (2)[Total: 6]7 Aluminium is extracted from its ore by electrolysis.Aluminium ore contains aluminium oxide.(a) This is the word equation for the reaction.aluminium oxidealuminium + oxygenThe aluminium oxide is reduced. What does this mean?Put a tick (✓) in the box next to the correct answer.The aluminium oxide loses oxygen.The density of the aluminium oxide decreases.The aluminium oxide loses energy.The volume of the aluminium oxide decreases.[1](b) The electrolysis process uses molten aluminium oxide.The diagram shows the arrangement of particles in molten aluminium oxide.A l 3+O 2–O 2–O 2–O 2–O 2–O 2–A l 3+A l 3+A l 3+O 2–O 2–O 2–A l 3+A l 3+O 2–O 2–O 2–A l 3+A l 3+A l 3+O 2–O 2–O 2–A l 3+(i) Which two words can be used to describe molten aluminium oxide?Put rings around the two correct answers.covalent gas ionic liquid molecular solid[2](ii) During the electrolysis, negative ions move to the positive electrode and positive ions move to the negative electrode. A product is made at each electrode.Draw straight lines to connect each electrode with the correct product made.electrode product madealuminiumaluminium oxidepositive electrodewaternegative electrodehydrogenoxygen[2]Aluminium has many different uses.(c)The uses of aluminium depend on making the best use of its properties.Draw four straight lines to connect each use with the most important reason for that use.use most important reasonaircraft parts low density and can be mixed with other metals to make it strong power cables shiny appearance and surface can be coloured using dyes drinks and food cans surface is non-toxic and does not react with dilute acids jewellery very good electrical conductivity and can be shaped into wires[2][Total: 7]8Sue reacts copper carbonate with a dilute acid to make copper chloride.dilute acidcopper carbonate(a)Complete the word and symbol equations for the reaction by filling in the empty boxes.copper carbonate+copper chloride+carbon dioxide+CuCO 3+2HClCuC l 2+CO 2+[2](b) Which other chemicals react with the same dilute acid to form copper chloride?Put rings around the two correct answers.copper hydroxide copper nitrate copper oxide copper sulfate[1](c)Sue adds solid copper carbonate to the dilute acid until no more solid reacts.At the end of the experiment, the beaker contains copper chloride solution and some left-over solid copper carbonate.copper chloride solutionsolid copper carbonateHow can Sue make some pure, dry copper chloride crystals from the mixture in the beaker?The quality of written communication will be assessed in your answer............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ (6)(d)Sue measures the mass of crystals that she has made (her actual yield).Sue weighs an empty dish.She puts her crystals into the dish and weighs it again.These are her results.mass of empty dish = 200.0 gmass of dish and crystals = 204.5 g(i) What is the mass of the crystals (the actual yield)?mass = ..................................................... g [1] (ii) The theoretical yield for Sue’s experiment is5.0 g.Sue knows thatpercentage yield =actual yield theoretical yield×100%Use the actual yield from part (i) to calculate a percentage yield for Sue’s experiment.percentage yield = .................................................... % [1][Total: 11]9 Alex adds zinc to some dilute sulfuric acid.He measures the volume of hydrogen gas given off every 30 seconds. (a)Draw straight lines to connect each chemical to its correct formula.chemical formulahydrogen H2SO4zinc Znsulfuric acid H2[2](b)What is the name of the salt that forms in the reaction between zinc and sulfuric acid?Put a ring around the correct answer.zinc chloride zinc hydroxide zinc nitrate zinc oxide zinc sulfate[1](c)Alex thinks that the reaction is too slow.He does not want to change the mass of the zinc.Suggest two ways that Alex could make the reaction faster.................................................................................................................................................... (2)(d) Alex measures the volume of hydrogen in the gas syringe for 5 minutes.He plots his results on a graph.50010201234time in minutesvolume ofgas in cm 3(i) Which statement is the best description of what is happening at the start of the reaction?Put a tick (✓) in the box next to the correct answer.No reaction ishappening.The reaction rate is at its fastest.The reaction is slow but getting faster.The reaction is happening at a constant rate.[1](ii) Which statement is the best description of what is happening after 5 minutes?Put a tick (✓) in the box next to the correct answer.The reaction hasstopped.The reaction rate is at its fastest.The reaction is increasing in rate.Gas is being given off at a constant rate.[1](e)Alex measures the pH of the contents of the flask at the start and at the end of the reaction.The pH is very low at the start and increases during the reaction.Why does the pH change in this way?................................................................................................................................................... (2)[Total: 9]END OF QUESTION PAPERBLANK PAGEPLEASE DO NOT WRITE ON THIS PAGEPLEASE DO NOT WRITE ON THIS PAGECopyright InformationOCR is committed to seeking permission to reproduce all third-party content that it uses in its assessment materials. OCR has attempted to identify and contact all copyright holders whose work is used in this paper. T o avoid the issue of disclosure of answer-related information to candidates, all copyright acknowledgements are reproduced in the OCR Copyright Acknowledgements Booklet. This is produced for each series of examinations and is freely available to download from our public website () after the live examination series.If OCR has unwittingly failed to correctly acknowledge or clear any third-party content in this assessment material, OCR will be happy to correct its mistake at the earliest possible opportunity.For queries or further information please contact the Copyright Team, First Floor, 9 Hills Road, Cambridge CB2 1GE.OCR is part of the Cambridge Assessment Group; Cambridge Assessment is the brand name of University of Cambridge Local Examinations Syndicate (UCLES), which is itself a department of the University of Cambridge.T h e P e r i o d i c T a b l e o f t h e E l e m e n t s* T h e l a n t h a n o i d s (a t o m i c n u m b e r s 58-71) a n d t h e a c t i n o i d s (a t o m i c n u m b e r s 90-103) h a v e b e e n o m i t t e d .T h e r e l a t i v e a t o m i c m a s s e s o f c o p p e r a n d c h l o r i n e h a v e n o t b e e n r o u n d e d t o t h e n e a r e s t w h o l e n u m b e r .12345670K e y1H h y d r o g e n 14H eh e l i u m27L il i t h i u m39B eb e r y l l i u m4r e l a t i v e a t o m i c m a s s a t o m i c s y m b o ln a m e a t o m i c (p r o t o n ) n u m b e r 11Bb o r o n512Cc a r b o n614N n i t r o g e n716O o x y g e n819Ff l u o r i n e 920N en e o n1023N as o d i u m1124M gm a g n e s i u m1227A la l u m i n i u m1328S i s i l i c o n1431P p h o s p h o r u s 1532S s u l f u r 1635.5C lc h l o r i n e 1740A ra r g o n1839Kp o t a s s i u m1940C ac a l c i u m2045S cs c a n d i u m2148T it i t a n i u m2251Vv a n a d i u m2352C rc h r o m i u m2455M n m a n g a n e s e 2556F ei r o n2659C o c o b a l t 2759N i n i c k e l 2863.5C uc o p p e r 2965Z n z i n c 3070G ag a l l i u m3173G eg e r m a n i u m 3275A sa r s e n i c 3379S es e l e n i u m 3480B rb r o m i n e 3584K rk r y p t o n3685R br u b i d i u m3788S rs t r o n t i u m3889Yy t t r i u m3991Z rz i r c o n i u m4093N bn i o b i u m4196M om o l y b d e n u m42[98]T c t e c h n e t i u m 43101R ur u t h e n i u m44103R hr h o d i u m 45106P dp a l l a d i u m46108A gs i l v e r 47112C dc ad m i u m48115I ni n d i u m 49119S nt i n50122S ba n t i m o n y51128T et e l l u r i u m52127Ii o d i n e53131X ex e n o n54133C sc a e s i u m55137B ab a r i u m56139L a *l a n t h a n u m57178H fh a f n i u m72181T at a n t a l u m73184Wt u n g s t e n74186R er h e n i u m75190O so s m i u m76192I ri r i d i u m 77195P tp l a t i n u m78197A ug o l d79201H gm e r c u r y 80204T l t h a l l i u m 81207P bl e a d82209B ib i s m u t h83[209]P op o l o n i u m 84[210]A ta s t a t i n e85[222]R nr a d o n86[223]F rf r a n c i u m 87[226]R ar a d i u m 88[227]A c *a c t i n i u m 89[261]R f r u t h e r f o r d i u m104[262]D bd u b n i u m105[266]S gs e a b o r g i u m106[264]B hb o h r i u m 107[277]H sh a s s i u m 108[268]M t m e i t n e r i u m109[271]D sd a r m s t a d t i u m110[272]R g r o e n t g e n i u m111E l e m e n t s w i t h a t o m i c n u m b e r s 112-116 h a v e b e e n r e p o r t e d b u t n o t f u l l y a u t h e n t i c a t e d。

九天国际教育GCSE真题Specimen QP - Paper 2 CIE Chemistry IGCSE

The syllabus is accredited for use in England, Wales and Northern Ireland as a Cambridge International Level 1/Level 2 Certificate.This document consists of 18 printed pages.© UCLES 2014[Turn over*0123456789*Cambridge International ExaminationsCambridge International General Certificate of Secondary EducationCHEMISTRY0620/02Paper 2 Multiple Choice (Extended) For Examination from 2016SPECIMEN PAPER45 minutesAdditional Materials: Multiple Choice Answer Sheet Soft clean eraserSoft pencil (type B or HB is recommended)READ THESE INSTRUCTIONS FIRSTWrite in soft pencil.Do not use staples, paper clips, glue or correction fluid.Write your name, Centre number and candidate number on the Answer Sheet in the spaces provided unless this has been done for you.DO NOT WRITE IN ANY BARCODES.There are forty questions on this paper. Answer all questions. For each question there are four possible answers A , B , C and D .Choose the one you consider correct and record your choice in soft pencil on the separate Answer Sheet.Read the instructions on the Answer Sheet very carefully.Each correct answer will score one mark. A mark will not be deducted for a wrong answer. Any rough working should be done in this booklet. A copy of the Periodic Table is printed on page 18. Electronic calculators may be used.1Amino acids are colourless and can be separated and identified by chromatography.paperWhat additional apparatus is required to identify the amino acids present in a mixture?A a locating agentB a rulerC a ruler and a locating agentD neither a ruler or a locating agent2The diagram shows the diffusion of hydrogen chloride and ammonia in a glass tube.The gases are given off by the solutions at each end of the tube.When hydrogen chloride and ammonia mix they produce a white solid, ammonium chloride.Which line shows where the white solid is formed?concentrated ammoniasolutionconcentrated hydrochloric acid© UCLES 2014 0620/02/SP/16© UCLES 2014 0620/02/SP/16[Turn over3 The diagram shows the structure of an atom.+key= proton = neutron = electronnWhich diagram shows the structure of an isotope of this atom?ABCD4 The table shows the structure of different atoms and ions.particleproton numbernucleon numbernumber of protonsnumber of neutronsnumber of electronsMg 12 24 12 W 12 Mg 2+ X 24 12 12 10 F 9 19 9 Y 9 F –9 19 9 10 ZWhat are the values of W, X, Y and Z?W X Y Z A 10 10 9 9 B 10 12 10 9 C 12 10 9 10 D 12 12 10 10© UCLES 20140620/02/SP/165 Iron is a metal. The structure of iron is described as a lattice of positive ions in a sea of electrons. Which of the following statements about iron are correct? 1 iron conducts electricity because the electrons are free to move 2 iron has a high melting point due to the strong covalent bonds 3 iron is an alloy 4 iron is malleable because the layers of atoms can slide over one anotherA 1 onlyB 1 and 3C 1 and 4D 2, 3 and 46 Which two elements react together to form an ionic compound?element electronic structure R T X Z2,4 2,8 2,8,1 2,8,7A R and TB T and XC X and ZD Z and R7 Ethene is an unsaturated hydrocarbon.HHHH C CWhich description of the bonding in ethene is correct?A All atoms in the molecule have a share of eight electrons.B Eachcarbon atom shares two of its electrons with hydrogen atoms and two of its electronswith a carbon atom. C Each carbon atom shares two of its electrons with hydrogen atoms and one of its electronswith a carbon atom. D The two carbon atoms share a total of six electrons with other atoms.8 What is the relative molecular mass, M r , of butanol? A 15 B 37 C 74 D 148© UCLES 2014 0620/02/SP/16[Turn over9 The chemical formulae of two substances, W and X, are given.W NaA l Si 3O 8X CaA l 2Si 2O 8 Which statements are correct? 1 W and X contain the same amount of oxygen. 2 W contains three times as much silicon as X. 3 X contains twice as much aluminium as W. A 1 and 2 B 1 and 3 C 2 and 3 D 1, 2 and 310 What is the concentration of a solution containing 1.0 g of sodium hydroxide in 250 cm 3 ofsolution?A 0.025 mol / dm 3B 0.10 mol / dm 3C 0.25 mol / dm 3D 1.0 mol / dm 311 Four students prepared hydrated copper(II ) sulfate by adding an excess of dilute sulfuric acid tocopper(II ) oxide. Each student used a different mass of copper(II ) oxide.dilute sulfuric acidCuOCuSO 4.5H 2O M r = 80 M r = 250After the copper(II ) sulfate had crystallised the students dried and weighed the crystals.Which student produced the highest percentage yield of hydrated copper(II ) sulfate?mass of copper(II ) oxide used / gmass of crystals produced / gA 4.0 11.5B 8.0 23.5C 12.0 35.0D 16.0 46.5© UCLES 2014 0620/02/SP/16cm 3 of ethyne, C 2H 2, are reacted with 500cm 3 of oxygen. The equation for the reaction is2C 2H 2(g) + 5O 2(g) → 4CO 2(g) + 2H 2O(l)What is the total volume of gas remaining at the end of the reaction? (all volumes are measured at room temperature and pressure)A 400 cm 3B 450 cm 3C 490 cm 3D 520 cm 313 Different metals were tested using the apparatus shown.Which pair of metals would produce the largest voltage? A copper and silver B magnesium and silver C magnesium and zinc D zinc and copper14 Three electrolysis cells are set up. Each cell has inert electrodes. The electrolytes are listed below. cell 1 aqueous sodium chloride cell 2 dilute sulfuric acidcell 3molten lead(II ) bromideIn which of these cells is a gas formed at both electrodes? A 1 and 2B 1 and 3C 2 onlyD 3 only© UCLES 2014 0620/02/SP/16[Turn over15 The statements refer to the electrolysis of concentrated copper(II ) chloride solution. 1 Electrons are transferred from the cathode to the copper(II ) ions. 2 Electrons move around the circuit from the cathode to the anode. 3 Chloride ions are attracted to the anode. 4 Hydroxide ions transfer electrons to the cathode. Which statements about the electrolysis of concentrated copper(II ) chloride are correct?A 1 and 3B 1 and 4C 2 and 3D 2 and 416 Water can be used to produce hydrogen gas.2H 2O → 2H 2 + O 2Which row describes bond breaking in the reactant?A B C Dendothermic endothermic exothermic exothermicheat absorbed heat released heat absorbed heat released17 Dinitrogen tetroxide, N 2O 4, breaks down into nitrogen dioxide, NO 2.N 2O 4(g) ⇌ 2NO 2(g)The reaction is reversible and endothermic. Which conditions will give the largest yield of nitrogen dioxide, NO 2?temperaturepressureA B C D high high low lowhigh low high low© UCLES 2014 0620/02/SP/16For which two reactions would this apparatus be suitable?reaction 1 AgNO 3(aq) + HC l (aq) → AgC l (s) + HNO 3(aq)reaction 2 2H 2O 2(aq) → 2H 2O(I) + O 2(g) reaction 3 MgO(s) + 2HC l (aq) → MgC l 2(aq) + H 2O(I)reaction 4 ZnCO 3(s) + 2HC l (aq) → ZnC l 2(aq) + CO 2(g) + H 2O(I)A 1 and 2B 1 and 3C 2 and 4D 3 and 419 A student investigates the rate of reaction between magnesium and excess sulfuric acid. The volume of hydrogen given off in the reaction is measured over time. The graph shows the results of two experiments, R and S.volume of hydrogen given offtimeWhich change in conditions would cause the difference between R and S? A A catalyst is added in S.B The acid is more concentrated in R than in S.C The magnesium is less finely powdered in R than in S.D The temperature in R is lower than in S.20 Which of these reactions shows only reduction?A Cu2+ + 2e– CuB Fe2O3 + 3CO 2Fe + 3CO2C HC l + NaOH NaC l + H2OD Mg + ZnSO4 Zn + MgSO421The red colour in some pottery glazes may be formed as a result of the reactions shown.CuCO3CuO + CO2CuO + SnO Cu + SnO2These equations show that ......1...... is oxidised and ......2...... is reduced.Which substances correctly complete gaps 1 and 2 in the above sentence?1 2A B C DCO2CuCO3CuOSnOSnO2CuOSnOCuO22Acids are compounds which donate protons (hydrogen ions).NH3(aq) + H2O(l) → NH4+(aq) + OH–(aq)Which compound in this equation is behaving as an acid?A ammoniaB ammonium hydroxideC none of themD water© UCLES 2014 0620/02/SP/16 [Turn over© UCLES 2014 0620/02/SP/1623 The reactions of four different oxides W, X, Y and Z are shown. W reacts with hydrochloric acid but not sodium hydroxide. X reacts with both hydrochloric acid and sodium hydroxide. Y does not react with either hydrochloric acid or sodium hydroxide. Z reacts with sodium hydroxide but not hydrochloric acid. Which row shows the correct types of oxide?acidic basic amphoteric neutral A B C DW X Z ZZ Y X WX W Y XY Z W Y24 A solution contains barium ions and silver ions and one type of anion. What could the anion be? A chloride only B nitrate onlyC sulfate onlyD chloride or nitrate or sulfate25A mixture containing two anions was tested and the results are shown below.test resultdilute nitric acid addedeffervescence of a gas whichturned limewater milkydilute nitric acid added, followed by aqueous silver nitrateyellow precipitate formed Which anions were present? A carbonate and chloride B carbonate and iodide C sulfate and chloride D sulfate and iodide26 Part of the Periodic Table is shown. The letters are not the chemical symbols of the elements.W ZYXWhich statement about the elements is not correct. A W has two electrons in the outermost shell. B Y is in Group IV of the Periodic Table.C X and Y bond covalently to form a molecule XY 4.D Z has more metallic character than Y.27 Astatine is an element in Group VII of the Periodic Table. It has only ever been produced in verysmall amounts. What are the likely properties of astatine?colour statereaction with aqueouspotassium iodideA B C D black dark brown green yellowsolid gas solid liquidno reaction brown colour no reaction brown colourmetal dilute hydrochloric acidwaterP Q Rhydrogen producedno reactionhydrogen producedhydrogen producedno reactionno reactionWhat is the order of reactivity of the metals?most reactiveleast reactiveA B C DP P R RR Q Q PQ R P Q29 Compound X is heated with carbon using the apparatus shown.carbonA brown solid is formed in the reaction tube and the limewater turns cloudy. What is compound X? A calcium oxideB copper(II ) oxideC magnesium oxideD sodium oxide30 Zinc is extracted from zinc blende.Zinc blende is an ore of zinc and consists mainly of zincsulfide.One of the steps in the process involves zinc sulfide reacting with oxygen from the air.What is the equation for this reaction?A 2ZnS + 3O2→ 2ZnO + 2SO2B 2ZnS + O2→ 2Zn + SO2C 2ZnS + O2→ 2ZnO + SD ZnS + 2O2→ ZnSO431The diagram shows the carbon cycle.Which process is shown by the arrow marked X?A combustionB photosynthesisC respirationD transpiration32 A catalytic converter removes harmful gases from motor car exhausts.doesnot take place in a catalytic converter?WhichreactionA 2CO + O2→ 2CO2B N2 + 2CO2→ 2NO + 2COC 2NO2→ N2 + 2O2D 2NO2 + 4CO → N2 + 4CO233The diagram shows some reactions of substance Y.heat with an Arraydilute acidWhich type of substance is Y?A an alcoholB a baseC a catalystD a metal34Which row shows the conditions for the manufacture of sulfuric acid?pressure/atm temperature/°C catalystA B C D22200200450250450250vanadium(V) oxideironironvanadium(V) oxide35Air containing an acidic impurity was neutralised by passing it through a column containing substance X.acidic airneutralised airWhat is substance X?A calcium oxideB sandC sodium chlorideD concentrated sulfuric acid36 In an oil refinery, petroleum is separated into useful fractions. The diagram shows some of these fractions.refinery gases gasoline Xdiesel oil YZWhat are fractions X, Y and Z?X Y ZA B C Dfuel oil fuel oil paraffin (kerosene) paraffin (kerosene)bitumen paraffin (kerosene)bitumen fuel oilparaffin (kerosene)bitumen fuel oil bitumen37 Which reaction does not take place in the dark? A CH 4 + 2O 2 → CO 2 + 2H 2O B CH 4 + C l 2 → CH 3C l + HC l C C 2H 4 + H 2O → C 2H 5OH D C 2H 4 + H 2 → C 2H 638Ethane and ethene are both hydrocarbons.Ethane reacts with chlorine and ethene reacts with bromine.Which row describes the type of reaction that ethane and ethene undergo?ethane ethene A B C Daddition addition substitution substitutionaddition substitution substitution addition39Esters are made by reacting an alcohol with a carboxylic acid. Which acid and alcohol react together to form the following ester?3CH 3CH 2CA propanoic acid and ethanolB propanoic acid and methanolC ethanoic acid and ethanolD ethanoic acid and methanol40 Which structure represents a polymer?ABCDPe rmission to re produce ite ms whe re third-party owne d mate rial prote cte d by copyright is include d has be e n sought and cle are d whe re possible. Eve ry reasonable effort has been made by the publisher (UCLES) to trace copyright holders, but if any items requiring clearance have unwittingly been included, the publisher will be pleased to make amends at the earliest possible opportunity.Cambridge International Examinations is part of the Cambridge Assessment Group. Cambridge Assessment is the brand name of University of Cambridge Local Examinations Syndicate (UCLES), which is itself a department of the University of Cambridge.。

九天国际教育GCSE真题June 2012 (v3) QP - Paper 5 CIE Chemistry IGCSE

九天国际教育GCSE真题June 2011 (v3) QP - Paper 1 CIE Chemistry IGCSE

This document consists of 16 printed pages.IB11 06_0620_13/FP© UCLES 2011[Turn over*8339598569*UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS International General Certificate of Secondary EducationCHEMISTRY 0620/13Paper 1 Multiple Choice May/June 201145 MinutesAdditional Materials: Multiple Choice Answer Sheet Soft clean eraserSoft pencil (type B or HB is recommended)READ THESE INSTRUCTIONS FIRSTWrite in soft pencil.Do not use staples, paper clips, highlighters, glue or correction fluid.Write your name, Centre number and candidate number on the Answer Sheet in the spaces provided unless this has been done for you.There areforty questions on this paper. Answer all questions. For each question there are four possibl e answers A , B , C and D .Choose the one you consider correct and record your choice in soft pencil on the separate Answer Sheet.Read the instructions on the Answer Sheet very carefully.Each correct answer will score one mark. A mark will not be deducted for a wrong answer. Any rough working should be done in this booklet. A copy of the Periodic Table is printed on page 16. You may use a calculator.© UCLES 20110620/13/M/J/111 The diagrams show the arrangement of particles in three different physical states of substance X.state 1state 2state 3Which statement about the physical states of substance X is correct? A Particles in state 1 vibrate about fixed positions. B State 1 changes to state 2 by diffusion.C State 2 changes directly to state 3 by condensation.D The substance in stage 3 has a fixed volume.2 In the diagrams, circles of different sizes represent atoms of different elements. Which diagram represents hydrogen chloride gas?BACD3 The diagram shows part of the Periodic Table.ACBDWhich element is correctly matched with its electronic structure?electronicstructure A 2,8,1 B 2,4 C 2,8,2 D 2,84An aqueous solution is coloured.Which method of separation would show that the solution contains ions of different colours?A chromatographyB crystallisationC distillationD filtration5 The table gives the solubility of four substances in ethanol and in water.A mixture containing all four substances is added to ethanol, stirred and filtered.The solid residue is added to water, stirred and filtered.The filtrate is evaporated to dryness, leaving a white solid.Which is the white solid?solubility inethanol waterA insoluble insolubleB insoluble solubleC soluble insolubleD soluble soluble6Which two elements react together to form an ionic compound?structureelement electronicW 2,4X 2,8Y 2,8,1Z 2,8,7A W and XB X and YC Y and ZD Z and W© UCLES 2011 0620/13/M/J/11 [Turn over7Electricity is passed through concentrated aqueous sodium chloride, as shown.What is the test for the gas formed at the positive electrode?A bleaches damp litmus paperB ‘pops’ with a lighted splintC relights a glowing splintD turns damp red litmus paper blue8Electricity from a power station passes through overhead cables to a substation and then to a school where it is used to electrolyse concentrated hydrochloric acid using inert electrodes.Which substances are used for the overhead cables and for the electrodes?overheadcables electrodesA aluminium copperB aluminium platinumC copper platinumD platinum aluminium9The nucleon number and proton number of the lithium atom are shown by the symbol Li73.What is the correct symbol for the lithium ion in lithium chloride?A 62Li− B 63Li+ C 73Li+ D 73Li−© UCLES 2011 0620/13/M/J/1110Three processes are listed.burning methane in airradioactive decay of 235Ureacting hydrogen with oxygen.Which statements about these processes are correct?1 Hydrogen and methane are being used as fuels.2 All the processes involve oxidation.3 All the processes are used to produce energy.A 1 and 2 onlyB 1 and 3 onlyC 2 and 3 only D1, 2 and 311 Which statement about the electrolysis of molten lead(II) bromide is correct?A A colourless gas is seen at the cathode.B A grey metal is seen at the anode.C A red/brown gas is seen at the anode.D A red/brown metal is seen at the cathode.12What is the relative molecular mass (M r) of HNO3?A 5B 31C 32D 6313The equation for the effect of heat on hydrated sodium carbonate is as shown.Na2CO3.10H2O(s) Na2CO3(s) + 10H2O(g)Statements made by four students about the reaction are given.P Anhydrous sodium carbonate is formed.Q Steam is formed.R There is a colour change from blue to white.S The reaction is reversible.Which students’ statements are correct?A P, Q and R onlyB P, Q and S onlyC Q, R and S onlyD P, Q, R and S© UCLES 2011 0620/13/M/J/11 [Turn over© UCLES 2011 0620/13/M/J/11For which two reactions would the apparatus be suitable?reaction 1 AgNO 3(aq) + HC l (aq) → AgC l (s) + HNO 3(aq) reaction 2 2H 2O 2(aq) → 2H 2O(l) + O 2(g)reaction 3 MgO(s) + 2HC l (aq) → MgC l 2(aq) + H 2O(l)reaction 4ZnCO 3(s) + 2HC l (aq) → ZnC l2(aq) + CO 2(g) + H 2O(l)A 1 and 2B 1 and 3C 2 and 4D 3 and 415 A student investigates the rate of reaction between magnesium and excess sulfuric acid.The volume of hydrogen given off in the reaction is measured over time.The graph shows the results of two experiments, R and S.volume of hydrogen given offtimeWhich change in conditions would cause the difference between R and S?A A catalyst is added in S.B The acid is more concentrated in R than in S.C The magnesium is less finely powdered in R than in S.D The temperature in R is lower than in S.© UCLES 2011 0620/13/M/J/11[Turn over16 Butane, ethanol and hydrogen are fuels.Which substances produce both carbon dioxide and water when used as a fuel?butane ethanolhydrogen A B C D17 X is a monatomic gas.gas XWhich statement about X is correct? A X burns in air. B X is coloured. C X is unreactive.D X will displace iodine from potassium iodide.18 The equation shows the reaction between a halogen and aqueous bromide ions.X 2 +2Br –(aq) → 2X –(aq) + Br 2…1… …2……3…Which words correctly complete gaps 1, 2 and 3?1 2 3 A chlorine brown colourless B chlorine colourless brown C iodine brown colourless D iodine colourless brown19Carbon dioxide is an acidic oxide that reacts with aqueous calcium hydroxide.Which type of reaction takes place?A decompositionB fermentationC neutralisationD oxidation20 A solution contains barium ions and silver ions.What could the anion be?A chloride onlyB nitrate onlyC sulfate onlyD chloride or nitrate or sulfate21 A mixture containing two anions was tested and the results are shown below.test result dilute nitric acid added effervescence of a gas whichturned limewater milkydilute nitric acid added, followedyellow precipitate formedby aqueous silver nitrateWhich anions were present?A carbonate and chlorideB carbonate and iodideC sulfate and chlorideD sulfate and iodide22 Which is not a typical property of an acid?A They react with alkalis producing water.B They react with all metals producing hydrogen.C They react with carbonates producing carbon dioxide.D They turn litmus paper red.© UCLES 2011 0620/13/M/J/11© UCLES 2011 0620/13/M/J/11[Turn over23 The diagram shows a section of the Periodic Table.WVXZYI II III IV V VI VII 0Which elements will conduct electricity at room temperature? A V, W and XB V, Y and WC W, X and ZD Y and Z24 Water from a reservoir flows to the water works where purification processes 1 takes placefollowed by process 2.What are purification processes 1 and 2?purification process 1purification process 2A chlorination filtrationB filtration chlorinationC fractional distillationfiltrationDfiltration fractional distillation25 The properties of a metal are important in deciding its use.Which row lists a property that is not correct for the use given?use of the metalmetal property neededA aluminium in aircraft wings low densityB aluminium in food containers resists corrosionC mild steel in car bodies high densityD stainless steel in cutlerydoes not rust© UCLES 2011 0620/13/M/J/1126 Brass is an alloy of copper and zinc.Which statement is correct?A Brass can be represented by a chemical formula.B Brass is formed by a chemical reaction between copper and zinc.C The alloy will dissolve completely in dilute hydrochloric acid.D The zinc in the alloy will dissolve in dilute hydrochloric acid.27 Which statement is correct for the element of proton number 19?A It is a gas that dissolves in water.B It is a hard metal that is not very reactive with water.C It is a non-metal that burns quickly in air.D It is a soft metal that is highly reactive with water.28 Which row describes the conditions used to make steel from the iron produced by a blastfurnace?calcium oxide(lime)oxygen heat A B C D29The table shows the results of adding three metals, P, Q and R, to dilute hydrochloric acid and to water.metal dilute hydrochloric acid waterP hydrogen produced hydrogen producedQ no reaction no reactionR hydrogen produced no reactionWhat is the order of reactivity of the metals?mostreactive least reactiveAP R QBP Q RC R QPD RP Q30Which substance is a metal?electrical conductivity(solid) electrical conductivity(molten)A high highB high lowC low highD low low31Greenhouse gases may contribute to climate change.Two of these gases are emitted into the atmosphere as a result of processes within animals.Gas ……1…… is produced by process ……3…… .Gas ……2…… is produced by process ……4…… .Which words correctly complete gaps 1, 2, 3 and 4?1 2 3 4A CO C2H6 digestion respirationB CO C2H6 respiration digestionC CO2 CH4 digestion respirationD CO2 CH4 respiration digestion32The diagram shows the composition by volume of air.XWhat is X?A argonB carbon dioxideC nitrogenD oxygen33The table gives the composition of the atmosphere of four newly discovered planets.planet composition of atmosphereW argon, carbon dioxide and oxygenX argon, nitrogen and oxygenY argon, carbon dioxide and methaneZ methane, nitrogen and oxygen On which planets is the greenhouse effect likely to occur?A W onlyB W, X and ZC W and Y onlyD W, Y and Z34Which two substances, when reacted together, would form a salt that contains two of the essential elements provided by fertilisers?A potassium hydroxide and nitric acidB potassium hydroxide and sulfuric acidC sodium hydroxide and nitric acidD sodium hydroxide and sulfuric acid35Statement 1: Alloying iron with other materials to form stainless steel prevents iron from rusting by excluding oxygen.Statement 2: Painting, oiling and electroplating are all methods of preventing iron from rusting.Which is correct?A Both statements are correct and statement 2 explains statement 1.B Both statements are correct but statement 2 does not explain statement 1.C Statement 1 is correct but statement 2 is incorrect.D Statement 2 is correct but statement 1 is incorrect.36What is the main constituent of natural gas?A carbon dioxideB ethaneC hydrogenD methane37 What is not essential for the formation of ethanol by fermentation?A lightB sugarC yeastD water38Which industrial process is shown in the diagram?crudeoil vapourA crackingB fermentationC fractional distillationD polymerisation39The diagram shows the structures of three compounds.OCH HOHCH HCHHHHOC CHHCHWhy do these three compounds belong to the same homologous series?A They all contain carbon, hydrogen and oxygen.B They all contain the same functional group.C They are all carbon based molecules.D They are all flammable liquids.40Compounds containing five carbon atoms in a molecule may have names beginning with ‘pent…’.What is the name of the compound shown?key= carbon= oxygen= hydrogenA pentaneB pentanoic acidC pentanolD pentene16Per mission to r epr oduce items wher e thir d-par ty owned mater ial pr otected by copyr ight is included has been sought and clear ed wher e possible. Ever y reasonable effort has been made by the publisher (UCLES) to trace copyright holders, but if any items requiring clearance have unwittingly been included, the publisher will be pleased to make amends at the earliest possible opportunity.University of Cambridge International Examinations is part of the Cambridge Assessment Group. Cambridge Assessment is the brand name of University of Cambridge Local Examinations Syndicate (UCLES), which is itself a department of the University of Cambridge.G r o u p140C eC e r i u m 58141P rP r a s e o d y m i u m 59144N d N e o d ym i u m 60P mP r o m e t h i u m61150S mS a m a r i u m62152E uE u r o p i u m63157G dG a d o l i n i u m64159T bT e r b i u m65162D yD y s p r o s i u m66165H oH o l m i u m67167E rE r b i u m68169T mT h u l i u m69173Y bY t t e r b i u m70175L uL u t e t i u m71232T hT h o r i u m 90P aP r o t a c t i n i u m 91238UU r a n i u m92N pN e p t u n i u m93P uP l u t o n i u m94A mA m e r i c i u m95C mC u r i u m96B kB e r k e l i u m97C fC a l i f o r n i u m98E sE i n s t e i n i u m99F mF e r m i u m100M dM e n d e l e v i u m101N oN o b e l i u m102L rL a w r e n c i u m1031HH y d r o g e n17L iL i t h i u m 323N aS o d i u m 1124M gM a g n e s i u m1240C aC a l c i u m 2045S c S c a n d i u m 2148T i T i t a n i u m2251V V a n a d i u m 2352C r C h r o m i u m 2455M n M a n g a n e s e 2556F e I r o n 2659C o C o b a l t 2759N i N i c k e l 2864C u C o p p e r 2965Z n Z i n c3070G aG a l l i u m3127A l A l u m i n i u m1311B B o r o n 512C C a r b o n614NN i t r o g e n716OO x y g e n819FF l u o r i n e928S iS i l i c o n1431PP h o s p h o r u s1532SS u l f u r1635.5C lC h l o r i n e1740A rA r g o n1820N eN e o n104H eH e l i u m273G eG e r m a n i u m3275A sA r s e n i c3379S eS e l e n i u m3480B rB r o m i n e3584K rK r y p t o n3639KP o t a s s i u m 1988S rS t r o n t i u m 3889Y Y t t r i u m 3991Z r Z i r c o n i u m4093N b N i o b i u m 4196M o M o l y b d e n u m 42T c T e c h n e t i u m 43101R u R u t h e n i u m 44103R h R h o d i u m 45106P d P a l l a d i u m 46108A g S i l v e r47112C dC a d m i u m48115I nI n d i u m49119S nT i n50122S bA n t i m o n y51128T eT e l l u r i u m52127II o d i n e53131X eX e n o n54137B aB a r i u m 56139L a L a n t h a n u m 57*178H fH a f n i u m72181T a T a n t a l u m 73184W T u n g s t e n 74186R e R h e n i u m 75190O s O s m i u m 76192I rI r i d i u m 77195P t P l a t i n u m78197A uG o l d79201H gM e r c u r y80204T lT h a l l i u m81207P bL e a d82209B iB i s m u t h83P oP o l o n i u m84A tA s t a t i n e85R nR a d o n86F rF r a n c i u m 87227A cA c t i n i u m899B eB e r y l l i u m4II I I I II V V V I V I I 085R bR u b i d i u m 37133C sC a e s i u m 55226R a R a d i u m 88T h e v o l u m e o f o n e m o l e o f a n y g a s i s 24d m 3a t r o o m t e m p e r a t u r e a n d p r e s s u r e (r .t .p .).a Xb a = r e l a t i v e a t o m ic m a s sX = a t o m i c s y m b o lb = p r o t o n (a t o m ic ) n u m b e rK e y *58-71 L a n t h a n o i d s e r i e s 90-103 A c t i n o i d s e r i e s D A T A S H E E T T h e P e r i o d i c T a b l e o f t h e E l e m e n t sPMT。

九天国际教育GCSE真题June 2013 (v3) QP - Paper 2 CIE Chemistry IGCSE

READ THESE INSTRUCTIONS FIRSTWrite your Centre number, candidate number and name in the spaces at the top of this page.Write in dark blue or black pen.You may need to use a pencil for any diagrams, graphs or rough working.Do not use staples, paper clips, highlighters, glue or correction ﬂ uid.DO NOT WRITE IN ANY BARCODES.Answer all questions.Electronic calculators may be used.A copy of the Periodic Table is printed on page 16.You may lose marks if you do not show your working or if you do not use appropriate units.At the end of the examination, fasten all your work securely together.The number of marks is given in brackets [ ] at the end of each question or part question.CHEMISTRY0620/23Paper 2May/June 20131 hour 15 minutesCandidates answer on the Question Paper.No Additional Materials are required.UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS International General Certiﬁ cate of Secondary EducationThis document consists of 14 printed pages and 2blank pages.[Turn overIB13 06_0620_23/3RP © UCLES 2013*4714033593*0620/23/M/J/13© UCLES 2013For Examiner’sUse1T he structures of ﬁ ve atoms, A , B , C , D and E , are shown below.ABCDE(a) A nswer the following questions about these structures. Each structure can be used once,more than once or not at all.(i) W hich two structures are hydrogen atoms? ............. and ............. (ii) W hich structure represents an atom of a metal?.............(iii) W hich structure has a proton (atomic) number of 3? ............. (iv) W hich structure has two neutrons in its nucleus? .............[5](b) T he structure of carbon-12 can be written C 612.W rite the structure of atom D in a similar way.[1](c) C omplete the following sentences about isotopes using words from the list below.atoms energy iron moleculesneutrons protons radioactive stableI sotopes are atoms of the same element with the same number of ....................... and different numbers of ....................... . Some isotopes such as uranium-235 are ........................ . Uranium-235 can be used as a source of ....................... .[4][Total: 10]For2The table shows some physical properties of the Group VII elements.Examiner’sUse Array(a)U se the information in the table to explain why(i)c hlorine is a gas at room temperature, ...................................................................... (1)(ii)b romine is a liquid at room temperature. ................................................................... (1)(b)D escribe the trend in atomic radius going down the group from chlorine to iodine. (1)(c)S uggest a value for the atomic radius of ﬂ uorine. (1)(d)D escribe the colour of chlorine. (1)(e)A chlorine atom has 17 electrons.Complete the following structure to show how the electrons are arranged.[2](f)C hlorine reacts with potassium bromide to form potassium chloride and bromine.(i)C omplete the symbol equation for this reaction.+ .......KBr → 2KC l + . (2)C l2(ii)E xplain why iodine does not react with potassium bromide. (1)[Total: 10]© UCLES 2013[Turn over0620/23/M/J/13ForExaminer’sUse3A luminium and gallium are in Group III of the Periodic Table.(a)T he heat from your hand is sufﬁ cient to melt gallium.D escribe the change in state from solid to liquid in terms of the kinetic particle theory.I n your answer include●t he difference in arrangement and closeness of the particles in a solid and a liquid,●t he difference in the motion of the particles in a solid and a liquid............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. (5)(b)G allium is a metal. Describe three physical properties of gallium which are typical ofmost metals.1........................................................................................................................................2........................................................................................................................................3. (3)(c)W hen it is a gas, gallium(III) chloride has the structure shown below.Ga C lC l C lC lGaC lC lW rite the molecular formula for gallium(III) chloride. (1)0620/23/M/J/13© UCLES 2013ForExaminer’sUse (d)A luminium is used to make high voltage electricity cables.T he table shows some properties of four metals which could be used for overhead powercables.metal relativestrengthdensity ing/cm3relative electricalconductivityprice$ per tonnealuminium9 2.700.42120copper308.920.79600tungsten10019.350.2450steel507.860.1700(i)S uggest why aluminium, rather than tungsten, is used in overhead power cables? (1)(ii)S uggest why steel, rather than copper, is used as a core for overhead power cables. (1)(iii)G ive two reasons why aluminium is used for overhead power cables rather than copper.1.................................................................................................................................2. (2)(e)S tate one use of aluminium other than as an electrical conductor. (1)[Total: 14]0620/23/M/J/13© UCLES 2013[Turn overFor4I mpure water needs to be treated if it is to be used in the home.Examiner’sUse(a) (i)E xplain why ﬁ ltration and chlorination are used in the water treatment process......................................................................................................................................................................................................................................................................... (2)(ii)S tate one use of water in the home. (1)(b)D escribe a chemical test for water.....................................................................................................................................test (2)result(c) (i)C omplete the diagram below to show the electron arrangement in a water molecule.[1](ii)I s the bonding in water covalent or ionic?G ive a reason for your answer. (1)(d)P ure water is neutral. Which one of these pH values is neutral?P ut a ring around the correct answer.pH 0 pH 6 pH 7 pH 9 pH 13[1](e)W ater reacts with sodium. The products are sodium hydroxide and hydrogen.W rite a word equation for this reaction.[1][Total: 9]© UCLES 20130620/23/M/J/130620/23/M/J/13© UCLES 2013[Turn overForExaminer’sUse5 E nergy is given out when fuels burn.(a) S tate the name given to a chemical reaction which releases energy...................................................................................................................................... [1] (b) H ydrogen can be used as a fuel.C omplete the symbol equation for the burning of hydrogen in oxygen........H 2 + ....... → 2H 2O [2] (c) G asoline is a mixture of hydrocarbons containing between 5 and 10 carbon atoms.F our of these hydrocarbons are shown below.C HHH C HH C HH AC HH C HH HC HHH C HH C HH B C H H C HH C HH C HH C HH HC HHH C HH C HH CC HH C HH C HH HC HHH C HH C HH D C HH C HH C HH C HH H(i) W hich one of these structures, A , B , C or D , has the highest relative molecularmass?Y ou are not expected to do any calculations. (1)(ii) G ive one use of gasoline. (1)0620/23/M/J/13© UCLES 2013For Examiner’sUse(d) T he table shows the boiling points of the straight-chain hydrocarbons in the gasolinefraction.(i) O n the grid below, plot a graph to show how the boiling point changes with thenumber of carbon atoms in these hydrocarbons. Draw a smooth curve through the points.567891018016014012010080604020boiling point / °Cnumber of carbon atoms[3](ii)U se your graph to deduce the boiling point of the hydrocarbon with 7 carbon atoms.boiling point ............... °C [1]For(e)T he alkanes are a homologous series of hydrocarbons.Examiner’sUse(i)W hat is meant by the term homologous series?.................................................................................................................................... (2)(ii)A lkanes can be cracked to form alkenes and smaller alkanes.S tate the conditions needed for cracking..................................................................................................................................... (2)[Total: 13]© UCLES 2013[Turn over0620/23/M/J/130620/23/M/J/13© UCLES 2013For Examiner’sUse6 I nks are mixtures of different dyes.(a) A student used paper chromatography to separate the dyes in a particular ink.D escribe how paper chromatography is carried out. You may draw a diagram to help explain your answer. I n your description include● the apparatus you would use,●how chromatography is carried out............................................................................................................................................ ........................................................................................................................................... ........................................................................................................................................... ..................................................................................................................................... [4] (b) The chromatogram below shows the results of a chromatography experiment. X , Y and Z are pure dyes containing only one compound.T he dyes present in four different inks, D , E , F and G are also shown.(i) W hich ink, D , E , F or G , contains all the dyes X , Y and Z ? (1)(ii) W hich ink, D ,E ,F orG , does not contain any of the dyes X , Y and Z ? (1)(iii) W hich ink contains the greatest number of different dyes? (1)ForExaminer’sUse(c) S ome inks contain ethanoic acid.C omplete the structure of ethanoic acid.[1](d) E thanoic acid can be used as a solvent.W hat is the meaning of the term solvent ? (1)(e) T he structure of a dye called Gambine R is shown below.C HO CCHH HNOHC C C C CCHC H(i) How many different types of atom are there in one molecule of Gambine R? (1)(ii) H ow many carbon atoms are there in one molecule of Gambine R? (1)[Total: 11]ForExaminer’sUse7 H ydrogen peroxide, H 2O 2, decomposes in the presence of an enzyme called peroxidase. The products of this reaction are water and oxygen.(a) (i) W hat is meant by the term enzyme ?.................................................................................................................................... (2)(ii) C omplete the symbol equation for this reaction........H 2O 2 → 2H 2O + O 2 [1] (b) A student followed the course of this reaction by measuring the volume of oxygenreleased over a period of time.T he diagram below shows some results that he obtained using hydrogen peroxide at three different concentrations.20406080100403020100volume of oxygen / cm 3time / secondsconcentration of H 2O 20.4 mol / dm 30.2 mol / dm 30.1 mol / dm 3(i) D escribe how the concentration of hydrogen peroxide affects the rate of this reaction............................................................................................................................... [1] (ii) O n the graph above, draw a line to show the course of the reaction when the startingconcentration of hydrogen peroxide is 0.3 mol / dm 3. [2] (iii)F or the concentration of hydrogen peroxide of 0.4 mol / dm 3, deduce●the volume of oxygen given off when the reaction is complete,........................ cm 3●the time it takes to produce 14 cm 3 of oxygen......................... seconds [2]ForExaminer’sUse(c) I n the presence of sulfuric acid, hydrogen peroxide reacts with iodide ions to form iodineand water. This involves the reduction of hydrogen peroxide.(i) W hat is the meaning of the term reduction ?.............................................................................................................................. [1] (ii) C omplete the word equation for the reaction of sulfuric acid with calcium hydroxide.sulfuric acid + calcium hydroxide → ............................ + ............................ (2)(iii) D escribe a test for iodide ions.test .............................................................................................................................result (2)[Total: 13]16Permission to reproduce items where third-party owned material protected by copyright is included has been sought and cleared where possible. Every reasonable effort has been made by the publisher (UCLES) to trace copyright holders, but if any items requiring clearance have unwittingly been included the publisher will be pleased to make amends at the earliest possible opportunity.University of Cambridge International Examinations is part of the Cambridge Assessment Group. Cambridge Assessment is the brand name of University of Cambridge Local Examinations Syndicate (UCLES), which is itself a department of the University of Cambridge.G ro u p140C eC e r i u m 58141P rP r a s e o d y m i u m 59144N d N e o d y m i u m 60P mP r o m e t h i u m61150S mS a m a r i u m62152E uE u r o p i u m63157G dG a d o l i n i u m64159T bT e r b i u m65162D yD y s p r o s i u m66165H oH o l m i u m67167E rE r b i u m68169T mT h u l i u m69173Y bY t t e r b i u m70175L uL u t e t i u m71232T hT h o r i u m 90P aP r o t a c t i n i u m 91238UU r a n i u m92N pN e p t u n i u m93P uP l u t o n i u m94A mA m e r i c i u m95C mC u r i u m96B kB e r k e l i u m97C fC a l i f o r n i u m98E sE i n s t e i n i u m99F mF e r m i u m100M dM e n d e l e v i u m101N oN o b e l i u m102L rL a w r e n c i u m1031HH y d r o g e n17L iL i t h i u m 323N aS o d i u m 1124M gM a g n e s i u m1240C aC a l c i u m 2045S c S c a n d i u m 2148T i T i t a n i u m2251V V a n a d i u m 2352C r C h r o m i u m 2455M n M a n g a n e s e 2556F e I r o n 2659C o C o b a l t 2759N i N i c k e l 2864C u C o p p e r 2965Z nZ i n c3070G aG a l l i u m3127A lA l u m i n i u m1311B B o r o n 512C C a r b o n614NN i t r o g e n716OO x y g e n819FF l u o r i n e928S iS i l i c o n1431PP h o s p h o r u s1532SS u l f u r1635.5C lC h l o r i n e1740A rA r g o n1820N eN e o n104H eH e l i u m273G eG e r m a n i u m3275A sA r s e n i c3379S eS e l e n i u m3480B rB r o m i n e3584K rK r y p t o n3639KP o t a s s i u m 1988S rS t r o n t i u m 3889Y Y t t r i u m 3991Z r Z i r c o n i u m4093N b N i o b i u m 4196M o M o l y b d e n u m 42T c T e c h n e t i u m 43101R u R u t h e n i u m 44103R h R h o d i u m 45106P d P a l l a d i u m 46108A gS i l v e r47112C dC a d m i u m48115I nI n d i u m49119S nT i n50122S bA n t i m o n y51128T eT e l l u r i u m52127II o d i n e53131X eX e n o n54137B aB a r i u m 56139L a L a n t h a n u m 57*178H fH a f n i u m72181T a T a n t a l u m 73184W T u n g s t e n 74186R e R h e n i u m 75190O s O s m i u m 76192I rI r i d i u m 77195P t P l a t i n u m78197A uG o l d79201H gM e r c u r y80204T lT h a l l i u m81207P bL e a d82209B iB i s m u t h83P oP o l o n i u m84A tA s t a t i n e85R nR a d o n86F rF r a n c i u m 87227A cA c t i n i u m899B eB e r y l l i u m4II I I I II V V V I V I I 085R bR u b i d i u m 37133C sC a e s i u m 55226R a R a d i u m 88T h e v o l u m e o f o n e m o l e o f a n y g a s i s 24d m 3a t r o o m t e m p e r a t u r e a n d p r e s s u r e (r .t .p .).a Xb a = r e l a t i v e a t o m ic m a s sX = a t o m i c s y m b o lb = p r o t o n (a t o m ic ) n u m b e rK e y *58-71 L a n t h a n o i d s e r i e s 90-103 A c t i n o i d s e r i e s D A T A S H E E T T h e P e r i o d i c T a b l e o f t h e E l e m e n t sPMT。

九天国际教育GCSE真题January 2014 QP - Paper 2C Edexcel Chemistry IGCSE

Turn over P42864A©2014 Pearson Education Ltd.1/1/1/1/*P42864A0120*Instructionst Use black ink or ball-point pen.t Fill in the boxes at the top of this page with your name,centre number and candidate number.t Answer all questions.t A nswer the questions in the spaces provided– there may be more space than you need.t Show all the steps in any calculations and state the units.t SInformationt The total mark for this paper is 60.t T he marks for each question are shown in brackets– use this as a guide as to how much time to spend on each question.Advicet Read each question carefully before you start to answer it.t Keep an eye on the time.t Write your answers neatly and in good English.t Try to answer every question.t Check your answers if you have time at the end.2*P42864A0220*3*P42864A0320*Turn overBLANK PAGE4*P42864A0420*5*P42864A0520*Turn over6*P42864A0620*2Bromine, chlorine, fluorine and iodine are elements in Group 7 of the Periodic Table.(a) Which two of these elements have the darkest colours?(1)....................................................................................................................................and ....................................................................................................................................(b) The equation for the reaction between hydrogen and chlorine isH 2 + Cl 2 o 2HClDifferent names are used for the product, depending on its state symbol.(i) What are the names used for HCl(g) and HCl(aq)?(2)HCl(g) .................................................................................................................................................................................................................................................................HCl(aq) ............................................................................................................................................................................................................................................................... (ii) The presence of HCl(g) can be confirmed by adding ammonia (NH 3) gas.State the observation in the reaction between HCl(g) and ammonia gas and write a chemical equation for the reaction.(2)observation ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................chemical equation ................................................................................................................................................................................................................................ (iii) The presence of chloride ions in HCl(aq) can be shown by mixing it with silvernitrate solution and dilute nitric acid.State the result of this test and complete the chemical equation for the reaction by adding the state symbols.(3)result .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................AgNO 3(.......................) + HCl(aq) o AgCl(.......................) + HNO 3(.......................)7*P42864A0720*Turn over8*P42864A0820*3Tungsten is a useful metal. It has the chemical symbol W. (a) One method of extracting tungsten involves heating a tungsten compound (WO 3)with hydrogen.(i) Suggest the chemical name of WO 3(1)....................................................................................................................................................................................................................................................................................(ii) Balance the equation for the reaction between WO 3 and hydrogen.(1)WO 3 + ............................H 2 o ............................W + ............................H 2O(iii) Why is this reaction described as reduction?(1)........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................(b) Scheelite is an ore of tungsten. The main compound in scheelite has the percentage composition by mass Ca = 13.9%, W = 63.9%, O = 22.2%.Calculate the empirical formula of this compound.(3)empirical formula = ...................................................9*P42864A0920*Turn over(c) Tungsten can also be obtained by reacting tungsten fluoride with hydrogen.The equation for this reaction isWF 6 + 3H 2 o W + 6HF(i) In an experiment, a chemist used 59.6g of tungsten fluoride. What is the maximum mass of tungsten he could obtain from 59.6 g of tungsten fluoride?Relative formula mass of tungsten fluoride = 298(2)maximum mass = ................................................... g(ii) Starting with a different mass of tungsten fluoride, he calculates that the massof tungsten formed should be 52.0 g. In his experiment he actually obtains 47.5 g of tungsten.What is the percentage yield of tungsten in this experiment?(2)percentage yield = ................................................... %(Total for Question 3 = 10 marks)10*P42864A01020*4A student investigated the neutralisation of acids by measuring the temperature changeswhen alkalis were added to acids of known concentrations.He used this apparatus to add different volumes of sodium hydroxide solution to a fixed volume of dilute nitric acid.He used this method. Ɣ measure the temperature of 25.0 cm 3 of the acid in the polystyrene cupƔ add the sodium hydroxide solution in 5.0 cm 3 portions until a total of 30.0 cm 3has been added(a) State two properties of the sodium hydroxide solution that should be kept constantfor each 5.0 cm 3 portion.(2)1 ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................2 ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................polystyrene cup11*P42864A01120*Turn over12*P42864A01220*13*P42864A01320*Turn over14*P42864A01420*(f)Another student used sulfuric acid instead of nitric acid in her experiments.She started with 25.0 cm 3 of sulfuric acid of concentration 0.650 mol/dm 3. She added 0.500 mol/dm 3 sodium hydroxide solution until the acid was completely neutralised.The equation for this reaction is2NaOH + H 2SO 4 o Na 2SO 4 + 2H 2O(i) Calculate the amount, in moles, of sulfuric acid used.(2)amount = ................................. mol(ii) Calculate the amount, in moles, of sodium hydroxide needed to neutralise thisamount of sulfuric acid.(1)amount = ................................. mol(iii) Calculate the volume, in cm 3, of sodium hydroxide solution needed to neutralisethis amount of sulfuric acid.(2)volume = ................................. cm 3(Total for Question 4 = 18 marks)15*P42864A01520*Turn over16*P42864A01620*(c)The equation for one reaction that could occur in process 2 is C x H y o C 5H 12 + 2C 2H 4(i) Deduce the formula of C x H y(1)....................................................................................................................................................................................................................................................................................(ii) Give the name of the compound C 5H 12(1)....................................................................................................................................................................................................................................................................................(iii) Draw the displayed formula of C 2H 4(1)(d) The structural formula of chloroethene formed in process 3 is CH 2CHClThe polymer formed in process 4 is poly(chloroethene).Draw the displayed formula for the repeat unit of poly(chloroethene).(2)17*P42864A01720*(e)Poly(chloroethene) is formed by addition polymerisation. Nylon is formed by condensation polymerisation.(i) How does condensation polymerisation differ from addition polymerisation?(1)........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................(ii) Poly(chloroethene) and nylon do not biodegrade easily.What is meant by the term biodegrade ?(2)................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................(iii) What feature of addition polymers makes it difficult for them to biodegrade?(1)........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................(Total for Question 5 = 13 marks)(TOTAL FOR PAPER = 60 MARKS)18*P42864A01820*BLANK PAGE19*P42864A01920*BLANK PAGE20*P42864A02020*BLANK PAGE。

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This document consists of 19 printed pages and 1 blank page.IB13 11_0620_13/RP© UCLES 2013[Turn over*5450428188*UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS International General Certificate of Secondary EducationCHEMISTRY 0620/13Paper 1 Multiple Choice Octob e r/Nov e mb e r 201345 MinutesAdditional Materials: Multiple Choice Answer Sheet Soft clean eraserSoft pencil (type B or HB is recommended)READ THESE INSTRUCTIONS FIRSTWrite in soft pencil.Do not use staples, paper clips, highlighters, glue or correction fluid.Write your name, Centre number and candidate number on the Answer Sheet in the spaces provided unless this has been done for you.DO NOT WRITE IN ANY BARCODES.There are forty questions on this paper. Answer all questions. For each question there are f our possible answers A , B , C and D .Choose the one you consider correct and record your choice in soft pencil on the separate Answer Sheet.Read the instructions on the Answer Sheet very carefully.Each correct answer will score one mark. A mark will not be deducted for a wrong answer. Any rough working should be done in this booklet. A copy of the Periodic Table is printed on page 20. Electronic calculators may be used.© UCLES 2013 0620/13/O/N/13The glass slide is removed. Diagram 2 shows the appearance of the gas jars after one hour.diagram 1diagram 2bromine vapourairWhich statement explains why the bromine and air mix together? A Bromine is denser than air. B Bromine is lighter than air.C Bromine molecules moved upwards and molecules in air moved downwards.D Molecules in bromine and air moved randomly.2 The diagram shows a method for separating a substance that contains X and Y.Which types of substance can be separated as shown? A compounds B elements C mixtures D molecules3Diagram 1 shows the paper chromatogram of substance X.RYXdiagram 1Diagram 2 shows the cooling curve for substance Y.timediagram 2Which statement about X and Y is correct?A X is a mixture and Y is a pure substance.B X is a pure substance and Y is a mixture.C X and Y are mixtures.D X and Y are pure substances.© UCLES 2013 0620/13/O/N/13 [Turn over© UCLES 2013 0620/13/O/N/134 The atomic structures of four atoms are shown.atomnumber of neutronsnumber of protonsnumber of electronsW6 6 6X 7 7 7Y 8 6 6 Z8 8 8Which pair of atoms are isotopes? A W and XB W and YC X and YD Y and Z5 The diagram shows the structure of three particles, R, S and T.key = electron = neutron = proton = nucleuse n p RSTWhich row describes these particles?ionsisotopes A R S and T B R and S T C S R and T D TR and S6Which statement about the bonding in a molecule of water is not correct? A Both hydrogen and oxygen have a noble gas configuration of electrons. B Each hydrogen shares its one electron with oxygen. C Oxygen shares one of its own electrons with each hydrogen.D Oxygen shares two of its own electrons with each hydrogen.© UCLES 2013 0620/13/O/N/13[Turn over7 The electronic structures of atoms P and Q are shown.P and Q react to form an ionic compound.What is the formula of the compound? A Q 7PB QPC QP 3D QP 78 A solid mixture contains an ionic salt, X, and a covalent organic compound, Y. Two students suggest methods of separating the mixture as shown.method 1method 2Which methods of separation are likely to work?12 A B C D© UCLES 2013 0620/13/O/N/13M r , is not correct for the molecule given? molecule M rA ammonia, NH 3 17B carbon dioxide, CO 2 44C methane, CH 4 16 Doxygen, O 2 1610 Two electrolysis experiments were carried out as shown in the diagram below.The graphite electrodes are labelled 1-4.molten sodium chlorideconcentrated aqueous sodium chlorideWhich row describes the products at the electrodes in these experiments?electrode 1electrode 2electrode 3electrode 4A chlorine hydrogen chlorine hydrogenB chlorine sodium chlorine hydrogenC chlorine sodium hydrogen chlorineD sodium chlorine sodium chlorine© UCLES 2013 0620/13/O/N/13[Turn over11 One molten compound and two aqueous solutions were electrolysed.The table gives the compounds electrolysed and the electrodes used.substance electrolysed electrodes1 concentrated hydrochloric acid carbon2 concentrated sodium chlorideplatinum 3molten lead bromideplatinumIn which experiments is a gas evolved at the cathode?A 1, 2 and 3B 1 and 2 onlyC 1 onlyD 3 only12When ammonium nitrate is added to water the temperature of the water decreases.The ammonium nitrate can be recovered by evaporating the water added.Which explains these observations?A The ammonium nitrate dissolves in the water and the process is endothermic.B The ammonium nitrate reacts with the water and the process is endothermic.C The ammonium nitrate dissolves in the water and the process is exothermic.D The ammonium nitrate reacts with the water and the process is exothermic.13 Which substance could not be used as a fuel to heat water in a boiler?A ethanolB hydrogenC methaneD oxygen14 Which substance is not a fossil fuel?A coalB keroseneC gasolineD wood© UCLES 2013 0620/13/O/N/1315 A student investigates the rate of reaction between zinc and an excess of sulfuric acid.The graph shows the results of two experiments, X and Y.volume of hydrogenWhich change explains the difference between X and Y? A A catalyst is added in Y.B A lower temperature is used in Y.C Larger pieces of zinc are used in Y.D Less concentrated acid is used in Y.16 When green iron(II ) sulfate is heated, it turns white and a colourless liquid is produced. When the liquid is put back into the white solid it changes back to green.What type of reaction takes place and what is the name of the liquid?type of reactionname of liquidA redox sulfuric acidB redox waterC reversible sulfuric acid Dreversible water17The reactions shown may occur in the air during a thunder storm.N2 + O2→ 2NO2NO + O2→ 2NO2NO + O3→ NO2 + O2Which row shows what happens to the reactant molecules in each of these reactions?N2 NO O3A oxidised oxidised oxidisedB oxidised oxidised reducedC reduced reduced oxidisedD reduced reduced reduced18Which are properties of an acid?1 reacts with ammonium sulfate to form ammonia2 turns red litmus blue1 2ABCD19Which of the following are properties of the oxides of non-metals?property 1 property 2A acidic covalentB acidic ionicC basic covalentD basic ionic© UCLES 2013 0620/13/O/N/13 [Turn over20The cations shown are identified by the colour of the precipitates formed when an excess of an aqueous solution of X is added.cations present effect of adding an excess ofaqueous Xiron(II) (Fe2+) greenprecipitatecopper(II) (Cu2+) lightblueprecipitateiron(III) (Fe3+) red-brownprecipitate What is X?A ammoniaB limewaterC silver nitrateD sodium hydroxide21Calcium, on the left of Period 4 of the Periodic Table, is more metallic than bromine on the right of this period.Why is this?Calcium hasA fewer electrons.B fewer protons.C fewer full shells of electrons.D fewer outer shell electrons.22The diagrams show the labels of four bottles.Which label is not correct?A B C DBromineBr2 Harmful liquid. Do not spill.IodineI2DangerAvoid breathing vapourfrom the solid.PotassiumKDangerStore under water.SodiumNaDangerStore under oil.© UCLES 2013 0620/13/O/N/1323An element has a melting point of 1084°C and a density of 8.93g/cm3. It’s oxide can be used asa catalyst.In which position in the Periodic Table is the element found?A B CD24The diagram shows a light bulb.filamentargonWhy is argon used instead of air in the light bulb?A Argon is a good conductor of electricity.B Argon is more reactive than air.C The filament glows more brightly.D The filament does not react with the argon.25Duralumin is an alloy. It contains aluminium, copper and magnesium.It has many uses including the manufacture of cooking utensils and ships.Which statement about duralumin and its properties is correct?A It is a good conductor of electricity.B It is brittle.C It is soluble in water.D The aluminium, copper and magnesium are chemically combined.26The list gives the order of some metals (and hydrogen) in the reactivity series.Metal X is also included:Most reactive KMgZn(H)XLeast reactive CuWhich row correctly shows the properties of metal X?reacts with dilute acids oxide reduced by carbonA no noB no yesC yes noD yes yes27 A new bicycle is being developed.Two different materials are used in its construction, both of which must be corrosion resistant.Which two metals could be used?A aluminium and mild steelB aluminium and stainless steelC mild steel and pure ironD pure iron and stainless steel28Iron is extracted from hematite in the Blast Furnace.The hematite contains silica as an impurity.What reacts with this impurity to remove it?A calcium oxideB carbonC carbon dioxideD oxygen29In which process is carbon dioxide not formed?A burning of natural gasB fermentationC heating limeD respiration30Carbon dioxide is produced whenX reacts with ethanol.Y reacts with sodium carbonate.What are X and Y?X YA H2 HC lB H2 NaOHC O2 HC lD O2 NaOH31 A sample of fertiliser is tested by warming it with aqueous sodium hydroxide.A colourless gas is produced which turns red litmus paper blue.Which element, essential for plant growth, must be present?A nitrogenB phosphorusC potassiumD sulfur32Iron rusts. This process involves the ……1…… of iron. Rusting can be prevented by covering the iron with grease or paint which stops ……2…… from reaching the surface of the iron.Which words correctly complete gaps 1 and 2?1 2A oxidation nitrogenB oxidation oxygenC reduction nitrogenD reduction oxygen33Oxides of nitrogen are given out from car exhausts.Which row best shows why oxides of nitrogen are unwanted?acidic toxicA no noB no yesC yes noD yes yes34Water is treated at a water works to make it fit to drink.What is present in the water when it leaves the waterworks?A bacteria onlyB bacteria and insoluble substancesC chlorine onlyD chlorine and soluble substancesproduct What is the product and what waste gas is formed?gasproduct wasteA lime, CaO carbon monoxideB lime, CaO carbon dioxideC slaked lime, Ca(OH)2 carbon monoxideD slaked lime, Ca(OH)2 carbon dioxide36Molecule X is both an alkene and a carboxylic acid.Which row describes X?presentsaturated –COOHA no noB no yesC yes noD yes yes37Which hydrocarbon reacts with steam to produce ethanol?A C2H4B C2H6C C3H6D C3H838 Petroleum is a mixture of different hydrocarbons.Which process is used to separate the petroleum into groups of similar hydrocarbons?A combustionB crackingC fractional distillationD reduction39 Which row represents compounds in the same homologous series?H C H H C H H C H H H H C H HC H H C H H C HH HH C H HC H H C HH HH C HHC HH O H H C HH C OH H C H HHC CH HH C HH C HH HHC H HC HH HH C HHOHH C HHC H H C Br H C H H HHC HH H H C HH H HC HH C OO HA B C D C C H HHC HH C HH HHH40 The diagram shows a flow diagram.petroleumsubstance X ● burns with a yellow flame ● does not decolourise bromine waterWhich type of organic compounds are X and Y?substance Xsubstance YA alcohol alkaneB alkane alkeneC alkene alkane Dalkane alcoholBLANK PAGE20Per mission to r epr oduce items wher e thir d-par ty owned mater ial pr otected by copyr ight is included has been sought and clear ed wher e possible. Ever y reasonable effort has been made by the publisher (UCLES) to trace copyright holders, but if any items requiring clearance have unwittingly been included, the publisher will be pleased to make amends at the earliest possible opportunity.Cambridge International Examinations is part of the Cambridge Assessment Group. Cambridge Assessment is the brand name of University of Cambridge Local Examinations Syndicate (UCLES), which is itself a department of the University of Cambridge. G r ou p140C eC e r i u m 58141P rP r a s e o d y m i u m 59144N d N e o d y m i u m 60P mP r o m e t h i u m61150S mS a m a r i u m62152E uE u r o p i u m63157G dG a d o l i n i u m64159T bT e r b i u m65162D yD y s p r o s i u m66165H oH o l m i u m67167E rE r b i u m68169T mT h u l i u m69173Y bY t t e r b i u m70175L uL u t e t i u m71232T hT h o r i u m 90P aP r o t a c t i n i u m 91238UU r a n i u m92N pN e p t u n i u m93P uP l u t o n i u m94A mA m e r i c i u m95C mC u r i u m96B kB e r k e l i u m97C fC a l i f o r n i u m98E sE i n s t e i n i u m99F mF e r m i u m100M dM e n d e l e v i u m101N oN o b e l i u m102L rL a w r e n c i u m1031HH y d r o g e n17L iL i t h i u m 323N aS o d i u m 1124M gM a g n e s i u m1240C aC a l c i u m 2045S c S c a n d i u m 2148T i T i t a n i u m2251V V a n a d i u m 2352C r C h r o m i u m 2455M n M a n g a n e s e 2556F e I r o n 2659C o C o b a l t 2759N i N i c k e l 2864C u C o p p e r 2965Z n Z i n c3070G aG a l l i u m3127A l A l u m i n i u m1311B B o r o n 512C C a r b o n614NN i t r o g e n716OO x y g e n819FF l u o r i n e928S iS i l i c o n1431PP h o s p h o r u s1532SS u l f u r1635.5C lC h l o r i n e1740A rA r g o n1820N eN e o n104H eH e l i u m273G eG e r m a n i u m3275A sA r s e n i c3379S eS e l e n i u m3480B rB r o m i n e3584K rK r y p t o n3639KP o t a s s i u m 1988S rS t r o n t i u m 3889Y Y t t r i u m 3991Z r Z i r c o n i u m4093N b N i o b i u m 4196M o M o l y b d e n u m 42T c T e c h n e t i u m 43101R u R u t h e n i u m 44103R h R h o d i u m 45106P d P a l l a d i u m 46108A g S i l v e r47112C dC a d m i u m48115I nI n d i u m49119S nT i n50122S bA n t i m o n y51128T eT e l l u r i u m52127II o d i n e53131X eX e n o n54137B aB a r i u m 56139L a L a n t h a n u m 57*178H fH a f n i u m72181T a T a n t a l u m 73184W T u n g s t e n 74186R e R h e n i u m 75190O s O s m i u m 76192I rI r i d i u m 77195P t P l a t i n u m78197A uG o l d79201H gM e r c u r y80204T lT h a l l i u m81207P bL e a d82209B iB i s m u t h83P oP o l o n i u m84A tA s t a t i n e85R nR a d o n86F rF r a n c i u m 87227A cA c t i n i u m899B eB e r y l l i u m4II I I I II V V V I V I I 085R bR u b i d i u m 37133C sC a e s i u m 55226R a R a d i u m 88T h e v o l u m e o f o n e m o l e o f a n y g a s i s 24d m 3a t r o o m t e m p e r a t u r e a n d p r e s s u r e (r .t .p .).a Xb a = r e l a t i v e a t o m ic m a s sX = a t o m i c s y m b o lb = p r o t o n (a t o m ic ) n u m b e rK e y *58-71 L a n t h a n o i d s e r i e s 90-103 A c t i n o i d s e r i e s D A T A S H E E T T h e P e r i o d i c T a b l e o f t h e E l e m e n t sPMT。