九年级第九单元检测题

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2020年人教版九年级下册第九单元课题 2 溶解度同步检测(包含答案解析)

课题2 溶解度同步检测一、选择题1.能证明某KCl溶液在20 ℃时已经达到饱和状态的方法是()A．温度不变时，向该溶液中加入少量水，结果溶液变稀B．取少量该溶液，降温至10 ℃时，有KCl晶体析出C．取少量该溶液升温，无KCl晶体析出D．温度不变时，向该溶液中加入少量KCl晶体，晶体质量不再改变2.室温时，从100 g饱和硝酸钾溶液中取出10 g溶液，那么剩余的硝酸钾溶液() A．还是饱和溶液 B．变成不饱和溶液了C．硝酸钾质量没变 D．硝酸钾和水的质量没变3.能证实20 ℃时原KNO3的溶液是饱和溶液的事实是()A．降温到10 ℃时有KNO3晶体析出B．蒸发掉10克水，有KNO3晶体析出C．加热到30 ℃后，再加入KNO3晶体仍能继续溶解D．在20 ℃时，向上述KNO3溶液中加入少量KNO3晶体，溶液的质量不变。

4.T℃时，将一定量的生石灰放入饱和的石灰水中，搅拌，并冷却到原温度，得到的溶液与原溶液相比，下列物理量前后不变化的是()①溶质质量②溶剂质量③溶液质量④溶质质量分数⑤溶解度A．①③⑤ B．②④⑤ C．②④ D．④⑤5.如图所示，甲图表示氯化钠在水中的溶解度曲线，乙图表示硝酸钾在水中的溶解度曲线。

下列说法错误的是()A．由甲图可知，氯化钠在40 ℃时的溶解度为36.6 gB．由乙可知，硝酸钾在水中的溶解度随温度的升高而增大C．比较甲乙可知，可采用蒸发结晶来提纯混有少量氯化钠的硝酸钾晶体D．比较甲乙可知，相同温度下影响固体溶质溶解度的因素是溶质的性质6.下列有关溶液的说法不正确的是()A．可口可乐汽水和白蒲黄酒都属于溶液B．固体物质的溶解度不一定都随温度的升高而增大C．一定温度下，向氯化钠饱和溶液中加入水后会变成不饱和溶液D．某物质在100 g溶剂里达到饱和状态时所溶解的质量就是该物质的溶解度7.a、b两种固体物质的溶解度曲线如图所示，下列说法中不正确的是()A．t1℃时，a、b物质的溶解度相等B．a物质的溶解度随温度的升高而增大，b物质的溶解度随温度的升高而减小C．t2℃时，将a、b两物质的饱和溶液分别降温至t1℃，所得的溶液溶质质量分数相等D．提纯a中混有少量的b，可采用降温结晶的方法8.20 ℃时，往100 g硝酸钾溶液中加入20 g硝酸钾，充分搅拌，硝酸钾部分溶解。

人教版九年级化学下册第九单元溶液单元测试题及答案

第九单元《溶液》单元测试题班级：姓名：学号：(有关相对原子质量：H-1， C-12， O-16， S-32， Cl-35.5, Ca-40 Cu-64,Zn-65,)一、单项选择题（本大题包括20小题，每小题2分，共40分）1.溶液一定是（）A.单质B.化合物C.纯净物D.混合物2.生活中常见的下列物质，不属于溶液的是（）A.糖水B.蒸馏水C.碘酒D.汽水3.一瓶100mL20%的NaCl溶液倒出10 mL后余下的溶液与最初的溶液相比（）A.溶质的质量分数变小了B.溶质和溶剂的比例变小了C.溶质的质量变少了D.B和C都正确4.下列关于溶液的说法正确的是（）A.溶液都是无色的B.溶液中可能含有多物质C.稀溶液一定是不饱和溶液D.均一、稳定的液体一定是溶液5.在一瓶NaCl饱和溶液中，当温度不变时，加入少量NaCl晶体，则（）A.溶液的质量增大B.晶体的质量不变C.晶体的质量增大D.晶体溶解一部分6.对于多数固体溶质的不饱和溶液，要使之成为饱和溶液的方法有（）①降低温度；②升高温度；③加同种溶质；④加溶剂；⑤恒温蒸发溶剂A.①③⑤B.②③④C.①②③D.②③⑤7.实验室有足量的20%的NaOH溶液和蒸馏水，欲配制10%的NaOH溶液100 g，需要20%的NaOH 溶液（）A.95 gB.10 gC.50 gD.100 g8.日晒海水可以得到食盐固体，其原因是（）A.受热时食盐的溶解度降低B.受热时食盐的溶解度显著增大C.受热时海水中的水分蒸发D.受热时海水发生分解9.配制一定溶质质量分数的氯化钠溶液的一些操作步骤见下图，正确的操作顺序是（）①②③④⑤A.④⑤①②③B.①②③④⑤C.③④①②⑤D.②①④③⑤10.一杯10 ℃的硝酸钾溶液，能证明它是饱和溶液的方法是（）A.蒸发5 g水有固体溶质析出B.加入少许硝酸钾晶体不溶C.把溶液降温至 0 ℃有固体溶质析出D.上述三种方法都行11.把100 mL 10%的氯化钠溶液稀释50倍，稀释后溶液中的溶质质量（）A.减少50倍B.增加50倍C.不变D.减少5倍12.20 ℃时，向100 g质量分数为 26.5%的饱和氯化钠溶液中加入 3.5 g氯化钠，此时溶液中溶质的质量分数为（）A.26.5%B.30%C.25%D.13.在粗盐提纯的实验中，若过滤后滤液仍浑浊，不可能是（）A.滤纸破了B.漏斗下端没有紧靠烧杯内壁C.液面高于滤纸边缘D.承接滤液的烧杯没洗干净14.将m g硫酸钾的不饱和溶液恒温蒸发水分至有晶体析出，在此变化过程中溶液里溶质质量分数p%与时间t的关系正确的是（）A B C D15．可以作为溶质的（）A．只有固体 B.只有液体 C.只有气体 D.气、液、固体都可以16．在一定温度下，为使溶质是固体物质的不饱和溶液变成饱和溶液，可采取的办法是（）A 增大压强 B 升高温度 C 加入溶质 D 增加溶剂17．现有60℃时硝酸钾的饱和溶液，若将其温度降到20℃，此时有关该溶液的说法不正确的是（）A．仍为饱和溶液 B 硝酸钾的溶解度发生了变化C．降温前后溶液的质量不变 D 降温前后溶剂的质量不变18．不能影响物质溶解度大小的因素是（）A 温度高低B 溶质、溶剂的量C 溶剂种类D 溶质种类19．现有一瓶溶质质量分数为10%的食盐水，关于该食盐水的说法正确的是（）A．m质：m剂=1：10 B．m质：m液=1：10 C．m质：m液=1：11 D．m剂：m液=10：11 20．将少量的下列物质加入到水中不能形成溶液的是（）A．味精 B．硫酸铜 C．金龙鱼牌食用调和油 D．食用加碘盐二、填空题（每空1分，共31分）汽水会自动喷出来，这说明气体在水中的溶解度与有关。

湖北省黄石市第八中学九年级化学下册第9单元溶液检测试题(解析版)

湖北省黄石市第八中学2021年秋九年级化学下册第9单元溶液检测试题（解析版）一、选择题：1.将60℃的硝酸钾饱和溶液降温到10℃时，有晶体析出（晶体中不含水），下列各量没有发生改变的是（）A．硝酸钾的溶解度B．溶液的质量分数C．溶液中溶质的质量D．溶液中溶剂的质量【答案】D【解析】2.医疗上用的生理盐水是0.9%的氯化钠溶液。

若在实验室配制0.9%的氯化钠溶液100g，下列配制过程正确的是（）A．用托盘天平称量0.9g氯化钠 B．用量筒量取100g水C．把食盐倒入量筒中搅拌溶解 D．用烧杯量取91g水【答案】A【解析】溶质的质量分数是溶质的质量占溶液质量的百分含量，故溶质的质量=溶液的质量×溶质的质量分数=100g×0.9%=0.9g.3.在配制一定溶质质量分数的蔗糖溶液时，导致溶液中蔗糖的质量分数偏大的可能原因有（）A．用来配制溶液的烧杯刚用少量蒸馏水润洗过B．用量筒量取水时俯视读数C．用托盘天平称取蔗糖时，将蔗糖放在右盘，且称量时使用了游码D．用了含少量杂质的蔗糖配制溶液【答案】B【解析】溶液中蔗糖的质量分数偏大的原因：溶质少了或溶剂多了。

用量筒量取水时俯视读数，读数偏大，而实际液体偏少，而导致溶剂的量少，使溶液中蔗糖的质量分数偏大。

4.a、b、c三种物质在水中的溶解度曲线如图所示,下列有关叙述错误的是()A.c物质属于易溶性物质B.20℃时,将10gb溶解在100g水中得110g不饱和溶液C.20℃时,a物质在水中的溶解度是10gD.50℃时a和b的两杯饱和溶液至20℃,析出a一定比b多【答案】D5.下列物质属于溶液的是( )A.石灰浆B.生理盐水C.菜汁D.牛奶【解析】根据溶液、浊液的区别，可知生理盐水是氯化钠以离子形式分散在水中，形成的均一、稳定的混合物，属于溶液。

6.下列叙述中错误的是（）A.“波尔多液”是无色、透明、均一、稳定的混合物B。

食用油溶于汽油，食用油是溶质，汽油是溶剂C.洗涤剂去油污是利用了乳化作用D.硝酸铵溶于水，溶液温度明显降低【答案】A【解析】波尔多液是由硫酸铜和生石灰和水混合制成的，含有不溶性的蓝色沉淀——氢氧化铜，A错误。

第九单元溶液期末复习检测---2022-2023学年九年级化学人教版下册

溶液期末复习检测一、选择题（每题只有一个选项）1.下列物质加入水中，能形成溶液的是（）A．沙子B．食盐C．植物油D．面粉2.下列有关溶液的说法中，正确的是()A.溶液都是无色的B.将NaCl放入植物油中搅拌，能形成溶液C.将40%的NaOH溶液均分成两份，每份溶液的溶质质量分数都为20%D.溶液是稳定的混合物3.下列洗涤方法利用了乳化原理的是（）A．用酒精清洗试管中的碘B．用汽油清洗衣服上的油污C．用洗洁精清洗餐具上的油污D．用水清洗试剂瓶中残留的氯化钠4.某化学兴趣小组利用如图装置进行实验：打开弹簧夹，将液体a滴入试管①中与固体b接触，若试管②中的导管口没有气泡产生，则液体a和固体b的组合可能是（）A．水和生石灰B．稀盐酸和碳酸钠C．水和硝酸铵D．过氧化氢溶液和二氧化锰5.下列关于溶液的说法错误的是()A. 与乳化作用相比，溶解能使物质混合得更均匀B. 20 ℃时，50 g水中溶解了15 g硝酸钾，则20 ℃时硝酸钾的溶解度是30 gC. 一定温度下，固体物质的溶解度不随水的质量改变而改变D. 硝酸钾的饱和溶液恒温蒸发部分水后，剩余溶液溶质质量分数不变6.常温下，对100 mL氯化钠饱和溶液进行图示实验。

下列分析错误的是()A.实验1后，甲、乙中溶液的溶质质量分数相等B.实验2后，乙中比甲中氯化钠的溶解度大C.实验2后，甲中溶液为氯化钠的不饱和溶液D.实验2后，甲、乙中溶液所含溶质质量相等7. 农业上常用溶质质量分数为16%氯化钠溶液选种，若配制100 g质量分数为16%的氯化钠溶液，下列说法不正确的是（）A．实验步骤是计算、称量、量取、溶解B．实验中用到的玻璃仪器有烧杯、量筒、玻璃棒和胶头滴管C．称量时，将16 g氯化钠固体直接放在托盘天平的右盘上D．用100 mL量筒量取所需水的体积8．已知KCl的溶解度如下表所示．．．A．10℃时，100g水里最多能溶解31.2gKClB．20℃时，向100g水中加入40gKCl，充分搅拌，所得溶液质量为140g C．通过升高温度，能将30℃时恰好饱和的KCl溶液转化为不饱和溶液D．50℃时，饱和KCl溶液中溶质的质量分数为42.6100%142.69. a、b两物质的溶解曲线如图，有关叙述正确的是A．a的溶解度大于b的溶解度B．10℃时a、b的饱和溶液，升温到t℃时仍是饱和溶液C．10℃时，用相同质量的a、b分别配成饱和溶液，所需水的质量a>bD．t℃时a、b的饱和溶液，升温到30℃所得溶液中溶质的质量分数a>b10.配制70 g 16%的NaCl溶液，下列操作会使所配溶液溶质质量分数大于16%的是()A. 称取氯化钠B. 转移氯化钠C. 量取水D. 配好后装瓶11.在“一定溶质质量分数的氯化钠溶液的配制”实验活动中，可能导致氯化钠溶液溶质质量分数偏大的是()A.量取水时量筒底部事先有少量水B.所用氯化钠固体不纯C.称量时砝码和药品的位置放反D.将量筒中的水倒入烧杯时有水溅出12．下图是两种物质的溶解度曲线。

九年级英语第九单元测试题

九年级英语第九单元测试题一、词汇:（10分）1. About 5000 cars were p_________ in the factory last month.2. This class is too large. We shall have to d________ it.3. The price of oil has r_________ to $100 a bucket.4. Of the 7 brothers only 4 now r________, the rest are dead.5. She was wearing a new dress, but he didn’t even n_________ it.6. After reading the letter, he t_________ it in the waste-paper basket.7. Please k_________ on the door before entering.8. I hope we’re not moving t__________ the war again.9. Xi’an is the city where many a_________ emperors made the capital.10. Today is so cold. The temperature is b__________ zero.二.用所给词的适当形式填空。

(10)1.The students don’t know the _______________ (different).2.Knives are used for ______________ (cut) .3.English is the most widely__________ (speak) in the world.4.English is spoken as the ____________ (one) language by most people in the U. S. A.5.He couldn’t get into the house because the door ___________(lock).6.I think English is very ______________ (use), too.7.______________ (travel) also use computers.8.He spoke very ________________ (clear), so it was easy to follow him .9. China is one of the _______________ (large) countries in the world .10.Three quarters of the _________________ (world) books are written in English .三．单项选择(20)（）1. Sam, you hair is too long and it looks dirty. You’d better ________ it _______.A. have, to cutB. get, cuttingC. have, cutD. get, cutted （）2. ---Your dress is so nice. ---Thanks! It ______ by my uncle as a birthday present.A. gaveB. was givenC. has givenD. will give（）3. The new bridge over the Yuan Shui River______last year.A.builtB.was builtC.has builtD. is built（）4 .All the books will _______ to the children who live in the small village.A. be sentB. sentC. be sendD. send（）5.Which language is the most widely ______ in the world?A.speakingB.speakC.spokeD. spoken .（）6. When ______ the car ________?A. did, inventB. was, inventedC. does, inventD. in, invented（）7. Jack ______ leave _____ his teacher comes back.A. doesn’t, untilB. /, untilC. won’t, /D. won’t, until（）8. Keys _______ used for ______ the doors.A. is, openingB. is, openedC. are, openingD. are opened（）9. My mother told me that my homework must _______ on time.A. finishB. be finishC. be finishedD. finished（）10. Was a car invented _____ March 4, 1876?A. onB. inC. atD. of（）11. The man is made _____ some extra hours.A. workB. to workC. workedD. working（）12. This is my new pen. It _______me 18 yuan.A. costB. spentC. paidD. took（）13. When __________ the car __________?A. did, inventB. was, inventedC. does, inventD. is, invented（）14. A talk on Chinese history ___________ in the school hall next Tuesday.A. be givenB. has givenC. will be givenD. will give （）15. The number of teachers in our school ________ 60 and a number of them ________ male teachers.A. is; areB. are; isC. am; areD. be; are （）16. Please take the medicine three times a day, __________ it won’t work well.A. andB. butC. orD. so（）17. The boy was often seen __________ on the sports ground.A. to playB. playC. playedD. to playing（）18. Gilbert __________ electricity, but Edison ________ the light bulb.A. discovered; createdB. invented; discoveredC. found; createdD. discovered; invented（）19. He found ________ very difficult ___________ the math problem.A. that; to solveB. this; solvingC. himself; solveD. it; to solve（）20. Now many Chinese farmers like traveling from one place to _________ to enjoy the beautiful views of our country.A. otherB. othersC. the othersD. another四、完型填空.( 15分)Jack was a rich young man. One day, he was ___31___ very happily down a street. Suddenly from his car came a terrible sound. He felt ___32___, so he stopped his car and looked around. He saw a child standing nearby with a few small stones in his hand. He jumped ___33___the car and found a dent (凹痕) in the door. He was so ___34___that he caught the boy and shouted at him, "Who are you? ___35___ did you throw a stone at my new car?" "Please, sir, please...I'm sorry! But I didn't know what else to do!" said the child. "I threw the stone ___36___ I wanted to get you to notice me. I need your ___37___!”Tears (眼泪) were running down the child's face. He said, "My brother ___38___ out of hiswheelchair (轮椅) and was almost under it. He is hurt and too ___39___ for me. Could you give me ___40___to get him back into his ___41___?"After hearing this, Jack was moved (感动) and ___42___to help him. He lifted the child's brother___43__back into his wheelchair. He looked over the boy carefully to make sure that he was OK. Then he watched the child ___44___his brother towards their home. Suddenly the child ___45___ and bowed (鞠躬) to him. Jack looked at the dent in his car and smiled. （）1A. walking B. riding C. jogging D. driving（）2A. excited B. interested C. surprised D. tired（）3A. into B. across C. over D. out of（）4A. happy B. sad C. angry D. sorry（）5A. Why B. How C. When D. Where（）6A. if B. because C. though D. while（）7A. money B. car C. help D. phone（）8A. fell B. got C. climbed D. pulled（）9A. difficult B. weak C. heavy D. thin（）10A. a hand B. a touch C. a pull D. a ring（）11A. car B. wheelchair C. house D. place（）12A. hurried B. preferred C. wanted D. planned（）13A. quietly B. gently C. calmly D. tightly（）14A. carry B. send C. take D. push（）15. A. cried out B. looked around C. turned around D. got up五、阅读理解（30分）(A)Life in the twenty-first century will be very different from life today. Between then and now many changes will take place, but what will the changes be?The population is growing fast. There will be a large number of people in the world and most of them will live longer than people live now.Computers will be much smaller and more useful, and there will be at least one in every home. And computer studies will be one of the important subjects in schools then.People will work fewer hours than they do now and they will have more free time for sports, watching TV and traveling. Traveling will be much easier and cheaper. And many more people will go to other countries for holidays.There will be changes in our food, too. Maybe no one will eat meat every day. Instead they eat more fruits and vegetables. People will be much healthier.Work in the future will be different, too. Dangerous and hard work can be done by robots. Because of this, many people will not have enough work to do. This will be a problem.（）1. There will be _________ in the future.A. small populationB. few changesC. more peopleD. few people （）2. In the future more people will _________.A. go to other countries for holidaysB. study at schoolC. will go earlierD. work for many hours（）3. People will prefer _________ to _________ in the future.A. fruits and vegetables; meatB. meat; fruits and vegetablesC. fruits and meat; vegetablesD. meat and vegetables; fruits（）4. The robots will do _________ in the future.A. all the workB. the dangerous workC. only houseworkD. the easy work for people（）5. Which of the following sentences is TRUE about the computer?A. It will be much bigger, so few people will use it.B. It will be much smaller and more useful for people. C. It will be smaller and not many people will use it.D. It will be bigger and a lot of people will use it.(B)An invention in front of your eyesWhat is the most important invention of all time? Is it the written word that helps us to record information? Is it the telephone that lets us talk to people from all over the world? Is it the car that lets us travel at great speeds to meet others? Umberto Eco, an Italian writer, thinks it is something quite different. He says the most important invention might be right in front of your eyes. He is talking about a simple pair of glasses. Modern eye glasses were invented around 1000 years ago. They were more than just a conventient way to read. Before glasses, writers, scientists or teachers who could not see properly had to memorizeeverything. After about ten years of poor eyesight, they could not remember well enough and could not work. Glasses meant that people could work into their old age. People who wanted to remember some information could write it down and read it. Eye glasses are one of the world’s greatest inventions and were probably worn by the people who designed the first telephones and cars.（）6. The invention of the written word is important because________.A. we need it to listenB. we need it to record informationC. we just need it to read （）7. The author thinks _____ is the greatest invention of all time in his passage.A. the telephoneB. the carC. simple pair of glasses（）8. Before glasses were invented, writers, scientists and teachers had to ____.A. memorize everythingB. write down everythingC. read everything（）9. What happened after glasses were invented?A. People could not remember well enoughB. People could not workC. People could write down some information and read it（）10. From this passage, we can know______.A. modern eye glasses were invented 100 years agoB. people who designed the first telephones and cars probably wore those glassesC. the author of this article is an American(C)Now some women are spending a weekend at Mother’s Camp（营地）. There, husbands and children are not allowed. Why would a woman want to take a vacation without her family? Some women say they need time to be alone.At Mother’s Camp a woman has room to herself. She can sleep, read or watch TV, and no one will bother her. No children will ask, “Mom, what’s for dinner?” No husband will say, “Oh, dear, I can’t find any clean socks.” In fact almost 50% of women in the United States work outside the home. Many of them work full-time and then come home to a second job-taking care of their homes and families. These working women say one of their biggest problems is housework.In the United States, working wives do about 75% of the housework. Many of their husbands say they want to help. But then they burn the rice or they can’t find the pans. They ask so many questions that their wives decide it is easier to do the job themselves. Some women go to Mother’s Camp just to get a break from housework. For two days they don’t cook, they don’t clean, they don’t look after their children and husbands. What do they do? They enjoy warm, sunny weather, walking, swimming or boating in a clear blue lake and sing songs around the campfire. They relax away from home. They have a really wonderful vacation at Mother’s Camp.（）11. From this passage we can see in the United States.A. women want to work outside the homeB. working wives do most of the houseworkC. husbands do as much housework as their wivesD. women do not like to stay at home with their families（）12. At Mother’s Camp, women can’t .A. watch TVB. read newspapersC. swim in the lakeD. bring their husbands and children（）13. Why would some mothers like to be alone? Because .A. they don ’t like their husbands and childrenB. they have to work full-timeC. they are too busy to relax themselvesD.they want a new life（）14. _______ is one of the biggest troubles for working wives in the United States.A. HouseworkB. Working outside the homeC. When to take a vacationD. Looking after their children（）15.What ’s the best title （标题）for this passage?A. Busy Working MothersB. Welcome to Mother ’s CampC. Mothers Relax Away from HomeD. Mothers in the US六、按要求完成下列句子(5)1. People believe that Bell invented the first telephone in 1876.(改为同义句)_______ ________ ________ that Bell invented the first telephone in 1876.2. They were invented by Julie Thompson( 对划线部分提问)________ ________ they invented _________?3. I was asked to play the piano .( 对划线部分提问)________ _______ you ________to do ?4. The water is used for watering the flowers (对划线部分提问)________ __________the water used for ?5. They stayed there until 11 o ’clock. (同义句)They _________ leave there _______11 o ’clock.The bicycle is one of the simplest yet most useful inventions in the world. What is most surprising is that it was not ___1___ earlier, although the great inventor Leonardo da Vinci had ___2___ pictures for bicycles and also __3___ flying machines and some other things. Those things were not produced ___4___ long after he died.A person riding a bicycle uses very energy ___5___ the bicycle move, and there is no pollution at all when you are riding. Even so, in __6___ countries, most people don ’t travel to work ___7___ bicycle. It is not ___8___ the bicycles are expensive or people feel ___9___ if they ride to work. It ’s because the number of cars on the roads becomes ___10___, it certainly becomes ___11___ to ride a bicycle. As a result, more people put ___12___ bikes away and go to work in their cars, and in this way, the situation is made more serious. Perhapsthe ___13___ way to make riding safer and more popular is to create paths ___14___ for bicycles, and to make it so difficult and expensive for drivers to take their cars into the city that they ___15___ back to use their bicycles.八、书面表达（15分）A) 雨伞也是我国一项古老的发表，请根据右表的内容，用被动语态写出5个句子a. ___________________________b. ___________________________c. ___________________________d. ___________________________e. ___________________________B) 请根据下表的内容，以How was the ball-point pen invented? 为题写一篇80词左右的短Notes: ball-point pen圆珠笔tanner制革工人refill再充填leak 漏How was the ball-point pen invented?_______________________________________________________________________________ _______________________________________________________________________________ _______________________________________________________________________________ __________________________________________。

九年级化学下册《第九单元溶液》单元检测卷(附答案)

九年级化学下册《第九单元溶液》单元检测卷(附答案) 一、单选题1．通过对溶液知识的学习，判断下列说法中正确的是A．将10%的硝酸钾溶液倒出一半，剩余溶液中溶质的质量分数仍为10%B．热糖水降低温度后有固体析出，则原热糖水一定是饱和溶液C．可以用冷却海水的方式得到氯化钠固体D．20℃时，氯化钠的饱和溶液，不能再溶解任何物质2．溶液与人们的生活息息相关，下列关于溶液的说法正确的是A．澄清石灰水是氢氧化钙的水溶液B．饱和溶液一定是浓溶液C．将100mL的生理盐水倒掉一半，剩余溶液的溶质质量分数减小一半D．升高温度可以将硝酸钾的不饱和溶液变为饱和溶液3．甲、乙两种不含结晶水的固体物质的溶解度曲线如图，下列说法中不正确的是A．t1℃时，50g甲的饱和溶液中溶解了10g的甲B．将t2℃甲、乙两种物质的饱和溶液升温至t3℃（溶剂的量不变），两种溶液中溶质的质量分数相等C．t2℃时，要使接近饱和的乙溶液达到饱和状态，可采用降温的方法D．分别将t2℃甲、乙两种物质的溶液降温至t1℃，可能都有晶体析出4．下列叙述错误的是A．能产生温室效应的气体有二氧化碳、一氧化碳、二氧化硫等B．元素周期表中第二周期共有8种元素C．用涂油的方法防止自行车链条锈蚀D．用洗涤剂乳化油脂除去餐具上的油污5．下列关于溶液的叙述正确的是A．溶液都是均一、稳定的液体B．溶液一定是无色的，且溶剂一定是水C．外界条件不改变，溶质不会从溶液中分离出来D．饱和溶液就是不能再溶解任何物质的溶液6．下列物质不属于溶液的是A．生理盐水B．冰水混合物C．医用酒精D．白醋7．75%的医用酒精（是指每100体积的医用酒精中含75体积的乙醇）可以杀死新型冠状病毒，下列说法不正确的是A．该医用酒精中的溶剂是水B．该医用酒精是均一的，稳定的C．100g该医用酒精中含乙醇75gD．乙醇和水混合后的体积小于二者体积之和8．与“饱和溶液”互推，下列有关叙述一定正确的是A．有晶体析出的溶液B．是浓溶液C．不能再溶解该物质的溶液D．混合物9．如图为M、N两种固体饱和溶液溶质的质量分数(C%)随温度(t)变化的曲线，下列说法不正确的是（）A．t1℃时，40gM放入60g水中形成饱和溶液B．M、N的饱和溶液从t2℃降温到t1℃，两溶液的溶质质量分数关系是：M=NC．80gN放入120g水中全部溶解，此时溶液的温度一定高于t1℃D．100gN的溶液，蒸发15g水、冷却至t1℃后得到10gN的晶体（不含结晶水），原溶液溶质的质量分数为40%10．有一瓶饱和溶液，在温度不改变的条件下，当溶液部分蒸发而有溶质析出时，则溶液A．变成不饱和溶液B．仍是饱和溶液C．溶质的溶解度变小D．溶质的溶解度增大11．下列有关对质量守恒定律的理解，正确的一项是（）A．将5g食盐和5g水混合制成10g食盐水，遵循质量守恒定律B．化学反应前后分子的总数一定不会发生变化C．5g硫和5g氧气充分反应后，生成物质量一定为10gD．镁条燃烧后固体质量增加，不遵循质量守恒定律12．下列有关溶液的说法中，正确的是A．溶液都是无色的B．将NaCl放入植物油中搅拌，能形成溶液C．将40%的NaOH溶液均分成两份，每份溶液的溶质质量分数都为20%D．溶液是均一稳定的混合物二、填空题13．（1）目前属于最清洁的气体燃料是____________；（2）金刚石和石墨性质存在明显差异的原因是______________；（3）A、B、C三种物质的溶解度曲线如图所示，根据如图给的信息回答问题：℃在t2℃时，A、B、C三种饱和溶液，降温到t1℃时仍然是饱和溶液的是____________；℃把C的不饱和溶液变成饱和溶液的方法有：加入溶质、蒸发溶剂、________________；℃在t2℃时，A饱和溶液的溶质质量分数是_______________（精确到0.1%）．14．如图是A、B两种固体物质的溶解度曲线。

完整版新人教版九年级第九单元精选练习题附答案

完整版新⼈教版九年级第九单元精选练习题附答案新⼈教版九年级第九单元精选练习题附答案Unit 9 I like music that I can dance to.第⼀课时Section A (1a ?2d)01 基础过关i.根据句意及汉语提⽰填写单词。

1. ______ ( 猜想) you won a prize. What would you do?2. If that's the ______ ( 实情)，we need more staff.3. The dress looks beautiful and feels _______ (光滑的).4. What do you usually do in your ______ ( 空闲的) time?5. There were two world _______ ( 战争) in the 20th century.n.⽤括号内所给单词的适当形式填空。

6. Feng Xiaogang is one of the best ______ (direct) in China.7. Jack is an _______ (Australia) boy and he comes from Sydney.8. Michael became an ______ (electricity) engineer when he was twenty －five years old.9. The Greens enjoy music that has great _______(lyric).10. Peter prefers ______ (swim) to playing basketball.川.单项选择。

( ) 11. —Do you often watch Man and Nature on TV?—Sometimes. It's an interesting program ，but I ______ Sports News.A. preferB. wantC. knowD. review( ) 12. —What kind of music do you like?—I like music ______ I can dance to.A. becauseB. whenC. whoD. that( ) 13. Mike likes going shopping with his friends in his _________ time.A .busy B. spare C. correct D. lively( ) 14.—What are you doing tomorrow ，Jane?A. Thank youB. It's rightC. I'm going to visit my grandmaD. You're welcome( ) 15. Karen likes music that she can sing _________ .A. along andB. along withC. alongD. withw.根据汉语意思完成句⼦，每空⼀词。

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1.—These bananas are about 5 kilos______ total.Would you like to buy them?—Sure.How much are they?A.forB.onC.inD.at2.They say that they will try their best______ their dreams.A.achieveB.achievingC.to achieveD.achieved3.Beijing is one of______ cities in the world.A.bigB.biggerC.biggestD.the biggest4.We don’t need to rush. We still have______time.A.plenty ofB.a fewC.a number ofD.a little bit5.______! It’s not the end of the world. Let’s try again.A.Put upB.Set upC.Cheer upD.Pick up6.They are going to have a celebration for their marriage. They______for ten years.A.have marriedB.got marriedC.have been marriedD.married7.We prefer______swimming rather than______TV.A.to go;watchB.going;watchingC.to go;watchingD.going;watch8.—I missed the beginning of the concert.—______The beginning was very wonderful.A.What a pity!B.Good luck!C.Congratulations!D.You’re welcome.9.Everybody______Hangzhou for its beautiful scenery, so millions of people go and visit it every year.A.hatesB.praisesC.warnsD.encourages10.The water was______for several hours while the workers repaired the pipes.A.taken offB.shut offC.set offD.got off11.By the end of the last term, we______about 2000 English words.A.will learnB.learnC.are learningD.had learned12.The red skirt______my mother bought for me is made of cotton.A.thatB.whenC.whoD.whose13.Running Man is a very relaxing TV program______is hot among the young people.A.whatB.whichC.whoD.whom14.—Jim, how do your parents like country music?—______my dad______my mom likes it. They both like country music.A.Either...orB.Not only...but alsoC.Neither...nor15.—Mike can’t go to the party with us because he has to stay at home and look after his mother.—______, we won’t wait for him any more.A.After allB.In that caseC.For exampleD.Above allⅡ完形填空(每小题1分,共15分)My parents always told me that I couldn’t dance,because it was a girl’s sport.But I never gave up my dream of becoming a dancing star.I practiced secretly,learning from books,movies,and shows.However,without my parents’ support,that16seemed all but impossible to reach.One summer,my little sister Maggie was going to dance lessons.I immediately asked17 parents for permission(允许)to take her to the lessons.What a18chance to learn dancing! One afternoon,I was practicing a new dance in my room,when Maggie walked19. “What’s the matter,Maggie?” I stopped20.“Denis,you are a great dancer!Can you help me?”“What is it?”I wondered.“There’ll be a dancing performance in my school,21the boys think I’m slow,and none of them wants to be my partner.22you dance with me for it?” She looked at me anxiously.“You can be a good dancer!” I encouraged her.“Let’s show those people that they have been 23all along.”In the following months,we24every evening,hiding from my parents.I was having a fantastic time and25Maggie improved a lot.Finally came the big day.I became26when I heard my parents would come to watch the performance.As the27began,I took a deep breath and tried to calm down.We moved perfectly,shining with pride.From the cheering of the crowd,I was sure we had28.My heart was beating wildly when I saw my29coming towards me.He put his hand on my shoulder.“Well done,Son.Though it is hard for me to admit it,you really looked like you30 this stage(舞台).Go for it and make us proud.”I’d been waiting for this moment for so long.I knew that the road ahead wasn’t going to be easy,but I wouldn’t give up.I wanted nothing more in life than to dance.16. A.line B.dream C.answer D.message17. A.my B.your C.his D.her18. A.similar B.funny C.good D.strange19. A.out B.away C.through D.in20. A.drawing B.dancing C.singing D.writing21. A.but B.or C.so D.if22. A.Need B.Must C.Could D.Should23. A.sad zy C.sorry D.wrong24. A.chatted B.rested C.slept D.practiced25. A.first B.soon C.never D.seldom26. A.shy B.bored C.nervous D.angry27. A.music B.lesson C.meeting D.party28. A.arrived B.finished C.succeeded D.regretted29. A.father B.mother C.sister D.classmate30. A.took away B.paid for C.fell into D.belonged toⅢ. A NameWriter Gary D.Schmidt (American,1957) Theodore Geisel (American,1904) Paulo Coelho(Brazilian,1947)Kate Wiggin (American, 1856) Publishing Time Over 5years agoIn 1957 In 1988 In 1903 Theme Developmentof a boy’smind A natural and easy attitude tolife A boy’s journey of following his dream A positive attitude to difficultyAchiev- ement Winning the Newbery Medal Attracting readers all over the world Breaking the Guinness recordBeing one ofthemost popularbooks Word box:publish 出版 achievement 成就 Newbery Medal 纽伯瑞文学奖 Guinness 吉尼斯根据表格所提供的信息选择最佳答案。