英文版B卷

(1) 1/2 H2 ( p 0 )＋1/2 Cl2 ( p 0 ) = HCl (a=1); (2) 2HCl (a=1) = H2 ( p 0 ) + Cl2 ( p 0 ). Thus the relation between the two E 0 is:
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0 (A) E 2 = 2 E10
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m1=0.01mol⋅kg-1 and m2=0.1 mol⋅kg-1 with the same conductance cell. The obtained electrical resistances are R1=1000 Ω and R2=500 Ω, respectively. Thus, the ratio of their molar conductivities is: ( ) (A) 1:5 (B) 5:1 (C) 10:5 (D) 5:10 2. At 298 K, in the infinite diluted solution containing the following ions, which one has the maximum ionic molar conductivity? ( ) 3+ 2+ + + (A) Al (B) Mg (C) H (D) K 3. For FeCl3 solution (with the fully ionization), its molality is m, mean activity coefficient is γ±, thus its activity is: ( )
0 (B) E 2 = - E10
0 (C) E 2 = -2 E10
0 (D) E 2 = E10
5. At 298 K, there are the following two cell: (1) Cu(s)| Cu+(a1)|| Cu+(a1), Cu2+(a2)|Pt (2) Cu(s)| Cu2+(a2)|| Cu+(a1), Cu2+(a2)|Pt . The cell reactions of
14. A certain reaction has only one reactant. The time for the conversion rate of 75 % is twice of which for the conversion rate of 50 %; the time for the conversion rate of 64 % is twice of which for the conversion rate of x %, thus x is (A) 32 (B) 36 (C) 40 (D) 60 15. A certain compound reacts with water. Its initial concentration is 1 mol·dm-3. One hour later, the concentration is 0.5 mol·dm-3; two hours later, the concentration is 0.25 mol·dm-3. Thus, the reaction order is (A) 0 (B) 1 (C) 2 (D) 3 16. A reaction rate constant k = 2.31 × 10-2mol-1·dm3·s-1, the initial concentration is 1.0 mol·dm-3. Thus, its reaction half-life is: (A) 43.29 s (B) 15 s (C) 30 s (D) 21.65 s 17. When acetic acid decomposes at high temperature, the experimentally measured concentrations with the variation of time for CH3COOH (A), CO (B) and CH=CO(C) were shown below. It can be concluded that the reaction is: (A) Elementary reaction (B) Opposing reaction (C) Parallel reaction (D) Consecutive reaction
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扬州大学试题纸
化 学 化 工 Item Mark I Single choice: There are four choices following each question, but only one choice is the best answer for the question, please choose it. (48 points)
1. Measure the two kind of electrolyte solutions with concentrations of
Single choice
( 2009 － 2010 学年第 二 学期) 学院 0801 班(年)级 课 Physical Chemistry ( B )卷
Multiple choices Numerical calculation and problem 2 3 4 5
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0 (C) both ∆ r Gm and E 0 are different
0 (D) ∆ r Gm is different， E 0 is the same
6. The following cell, for which, the electromotive force is independent of the activity of Cl-? (A) Zn(s) | ZnCl2(a)|Cl2( p 0 )|Pt (B) Zn(s) | ZnCl2(a1)||KCl(a2)|AgCl(s)|Ag (C) Ag(s) | AgCl | KCl(a) | Cl2( p 0 )|Pt (D) Pt|H2(pθ)|HCl(a)| Cl2( p 0 )|Pt 7. The surface tension of pure water is defined as the interface tension between water and which of the following contacted phases under the constant temperature, the constant pressure and constant composition? (A) Saturated water vapor (B) Air containing saturated water vapor (C) Air (D) Air containing water vapor 8. In a sealed container, there are two droplets of different sizes, after long-term placement, there will occur: (A) The large droplet becomes larger and the small one becomes smaller (B) Both the two droplets become larger
(C) The large droplet becomes smaller and the small one becomes larger (D) Both the two droplets become smaller 9. The following diluted solutions with the same molar concentration, which one undergoes the negative surface adsorption? (A) Sulfuric acid (B) hexanoic acid (C) stearic acid (D) benzoic acid 10. Whether to form W/O type or O/W type emulsion for the organic liquid and water, it is dependent on the HLB of emulsifier. Generally, A) with large value of HLB, it is easy to form W/O type (B) with small value of HLB, it is easy to form O/W type (C) with large value of HLB, it is easy to form O/W type (D) with small value of HLB, it is difficult to form W/O type 11. The principle for the ore flotation (矿石浮选) is based on the surfactants: ( ) (A) Emulsion (B) Solubilization (C) Decontamination effect (D) Wetting 12. For the solubilization, the incorrect statement is: (A) Solubilization can reduce the chemical potential of the dissolved substances (B) Solubilization system is thermodynamically stable system, whereas, emulsion or sol is thermodynamically unstable system. (C) Solubilization has the same effect as dissolution, both being able to lead the siginificant changes in the colligative properties. (D) Solubilization can be realized in the ionic surfactant with a large number of formed micelles 13. For the order of reaction, the correct statement is: (A) Only the order of elementary reaction is positive integer (B) The order of reaction is not less than zero (C) Catalyst does not change the reaction order (D) The reaction order can be determined through experiments 第3页 共8 页