北京市西城区2009年文综适应性练习 2009.3
初中数学易错题
天津市汉沽一中2008-2009学年度高三第四次月
化 学 2008年12月
本试卷共 14 页,29小题,满分150分。考试用时120分钟。
相对原子质量; H 1 C 12 N 14 O 16 S 32 F 19 Cl 35.5 Al 27 Ca 40 Cu 64
Fe 56 K 39 Mg 24 Na 23 La 139 Zn 65 M n 55 N i 59
2008年高考完形填空专练21--40篇
21
阅读下面短文,掌握其大意,然后从1―20各题所给的四个选项(A、B、C和D)中,选出最佳选项。
Coming home from school that dark winter day so long ago, I was
filled with excitement of having the weekend off. But I was 1 into stillness by what I saw. Mother,
seated at the far end of the sofa, 2 , with the second-hand green
typewriter on the table. She told me that she couldn’t type fast and then she
was out of work. My shock and embarrassment(尴尬)at finding Mother in tears was a perfect proof of how 3 I understood the pressures on her.
Sitting beside her on the sofa, I began very 4 to understand. “I guess we all have to 5 sometime, ”Mother said quietly. I could 6 her pain and the tension(压力)of 7 the strong feelings that were interrupted
by my arrival. Suddenly, something inside me 8 . I reached out and put my arms
around her. She broke then. She put her face 9 my shoulder and sobbed. I held her 10 and didn’t try to talk. I knew I was
doing what I should, what I could 11 it was enough. In that moment, feeling
Mother’s 12 with feelings, I understood for the first
time her being so easy to 13 . She was still my mother, 14 she was something 15 : a person like me, capable of fear
and 16 and failure. I could feel her pain as she
must have felt mine on a thousand occasions(场合)when I sought
A week later Mother took a job selling dry goods at half the salary the radio station 18 . “It’s a job I can do, though”she said simply. But the evening practice on the old green typewriter continued. I had a very 19 feeling now when I passed her door at night and heard her tapping 20 across the paper. I knew there was something more going on in there than a woman learning to type.
1. A. tired B. ashamed C. lazy D. shocked
2. A. crying B. smiling C. thinking D. whispering
3. A. eagerly B. worriedly C. little D. much
4. A. quickly B. slowly C. suddenly D. proudly
5. A. fail B. win C. fall sick D. give in
6. A. know of B. watch C. sense D. recognize
7. A. holding back B. putting away C. sitting up D. stopping from
8. A. lit up B. came true C. turned D. increased
9. A. to B. up C. through D. against
10. A. tightly B. thoughtfully C. carefully D. politely
11. A. and that B. now that C. but that D. so that
12. A. hand B. face C. hair D. back
13. A. content B. break C. fall D. understand
14. A. therefore B. however C. yet D. though
15. A. more B. much C. little D. huge
16. A. wound B. defeat C. cut D. hurt
17. A. kindness B. memory C. comfort D. support
18. A. supplied B. offered C. paid for D. contributed
19. A. different B. hard C. pleasant D. serious
20. A. off B. away C. out D. through
22
阅读下面短文,掌握其大意,然后从1―20各题所给的四个选项(A、B、C和D)中,选出最佳选项。
Some personal characteristics play an important role in the development of one’s intelligence . But people fail to realize the importance of training these factors in young people .
The so-called ‘non-intelligence factors’(非智力因素)include 1 feelings , will , motivation (动机), interests and habits . After a 30-year follow-up study of 8000 males , American psychologists (心理学) 2 that the main cause of disparities in intelligence is not intelligence 3 , but non-intelligence factors including the desire to learn , will power and self-confidence .
4 people all know that one should have definite objectives , a strong will and good learning habits , quite a number of teachers and parents don’t pay much attention to 5 these factors .
Some parents are greatly worried 6 their children fail to do well in their studies . They blame either genetic (遗传的)factors , malnutrition ,(营养不良)or laziness , but they never take 7 consideration these non-intelligence factors . At the same time , some teachers don’t inquire into these , as reasons 8 students do poorly . They simply give them more courses and exercises , or 9 criticize or laugh at them . After all , these students lose self-confidence . Some of them just feel defeated and 10 themselves up as hopeless . Others may go astray(迷途)because they are sick of learning . 11 investigation of more than 1,000 middle school students in Shanghai showed that 11.5 per cent of them were 12 of learning , because of examinations , 1.4 per cent lacked persistence , initiative (主动)and consciousness (正直地、谨慎的)and 10.3 per cent were sick of learning .
It is clear 13 the lack of cultivation (培养) of non-intelligence factors has been a main 14 to intelligence development in teenagers . It even causes an imbalance between physiological (生理的)and 15 development among a few students .
If we don’t start now to 16 the cultivation of non-intelligence factors , it will not only affect the development of the 17 of teenagers , but also affect the quality of a whole generation . Some experts have put forward 18 about how to cultivate students’ non-intelligence factors .
First , parents and teachers should 19 understand teenage psychology . On this basis , they can help them to pursue (调动)the objectives of learning , 20 their interests and toughening their willpower .
1.A.one’s B.their C.his D.her
2.A.came out B.found out C.made out D.worked out
3.A.in itself B.by itself C.itself D.on its own
4.A.Though B.Nevertheless C.However D.Moreover
5.A.believing B.studying C.cultivating D.developing
6.A.about B.when C.how D.whether
7.A.for B.in C.into D.over
8.A.why B.that C.when D.how
9.A.ever B.even C.still D.more
10.A.put B.get C.handle D.give
11.A.The B.An C.Another D.A
12.A.afraid B.ahead C.aware D.ashamed
13.A.that B.how C.why D.which
14.A.difficulty B.question C.threat D.obstacle(障碍)
15.A.intelligent B.characteristic C.psychological D.physical
16.A.practise B.thrust C.strengthen D.urge
17.A.intelligence B.diligence C.maturity(成熟)D.performance
18.A.projects B.warnings C.suggestions D.decision
19.A.fully B.greatly C.very D.highly
20.A.insuring B.going C.encouraging D.exciting
23
阅读下面短文,掌握其大意,然后从1―20各题所给的四个选项(A、B、C和D)中,选出最佳选项。
We’ve heard it before-we’ve heard it on the news, from teachers, from parents -children and teenagers today are growing up too fast. There are not too many people that will 1 with that statement. Teenagers are faced with serious problems and decisions at an early 2 . In fact most teenagers’ daily schedules(日程表)are as 3 as those of an adult’s.
I have been working since I
was thirteen, and always in
We are expected to work hard, get excellent 8 , be in a good relationship, and know what we want to do 9 . The list goes on and on. But the 10 is clear: We live in a society today that is 11 our childhood. We no longer have many years to be careless and fancy-free. We are expected to 12 the strict school rules and to excel (擅长)in everything we do.
I’ve known these things for a long time, and knew that they 13 me. But, I never really admitted it until last night, when I learned a 14 lesson, taught to me by my boss where I work. We had finished a job at a remote(遥远的)site. It was about 11:30 at night, and we had 15 to his house. We were talking about the 16 he had been making to his home. One of the things he said was “I 17 my basketball hoop(篮圈). ”Then he threw a basketball to me.
I hadn’t
We proceeded to shoot hoops for about 5 minutes. Both of us were terribly bad at it, but we spent the whole time 19 like children. Then I realized something: I am still a child. Oh, the law says I’m an adult. But, we are still really and truly children. We all need to have 20 once in a while.
1. A. argue B. disagree C. satisfy D. discuss
2. A. age B. stage C. year D. grade
3. A. certain B. busy C. careful D. perfect
4. A. companies B. places C. positions D. offices
5. A. study B. speak C. work D. act
6. A. last B. other C. rest D. coming
7. A. purposes B. success C. goals D. jobs
8. A. textbooks B. grades C. teachers D. schools
9. A. in life B. in time C. for ages D. for ever
10. A. information B. message C. notice D. idea
11. A. ruining B. correcting C. envying D. shortening
12. A. respect B. accept C. learn D. follow
13. A. inspired B. disappointed C. affected D. frightened
14. A. valuable B. serious C. important D. useful
15. A. walked B. flown back C. gone back D. driven
16. A. furniture B. improvements C. equipment D. arrangements
17. A. moved B. fixed C. sold D. broke
18. A. played B. caught C. touched D. held
19. A. laughing B. shouting C. running D. shooting
20. A. a rest B. a talk C. fun D. sports
24
阅读下面短文,掌握其大意,然后从1―20各题所给的四个选项(A、B、C和D)中,选出最佳选项。
Anthropology is a science which deals with man and his social habits. I think of anthropology here as “being interested, without 1, in the way other people choose to live and 2.”
―When you are curious about the way someone behaves or the way 3 feel about something, it’s 4 that you will he annoyed(恼火).
When someone acts in a way that seems 5 to you, rather than react in your usual way, such as “I can't believe they would do that,” 6 say something to yourself like “I see, that must be the way they 7 things in their world. Very interesting.” In order for this 8 to help you, you have to be genuine (真诚的).
Recently I was at a
shopping mall with my six-year old daughter
When you are interested in other perspectives, it doesn’t mean you’re 17 them. I certainly wouldn’t choose a punk rock lifestyle or 18 it to anyone else. At the same time, however, it’s really not my 19 to judge it either. One of the most important rules of joyful living is that judging others takes a great deal of energy and 20 you away from where you want to be.
1. A. agreement
B. judgrnent
C. improvement
D. entertainment
2. A. behave
B. speak
C. grow
D. eat
3. A. you
B. they
C. I
D. we
4. A. natural
B. certain
C. obvious
D. impossible
5. A. normal
B. common
C. strange
D. passive
6. A. just
B. also
C. still
D. never
7. A. make
B. find
C. see
D. get
8. A. person
B. way
C. interest
D. word
9. A. whde
B. until
C. since
D. when
10. A. tried on
B. grown up
C. acted out
D. dressed up
11. A. pleased
B. interested
C. bored
D. excited
12. A. views
B. questions
C. advice
D. plan
13. A. blocked
B. changed
C. enlarged
D. raised
14. A. softer
B. higher
C. happier
D. angrier
15. A. similar
B. confident
C. humorous
D. different
16. A. and
B. but
C. so
D. or
17. A. like
B. for
C. beside
D. against
18. A. present
B. connect
C. send
D. suggest
19. A. place
B. attempt
C. fault
D.decision
20. A. gives
B. brings
C. pulls
D.puts
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阅读下面短文,掌握其大意,然后从1―20各题所给的四个选项(A、B、C和D)中,选出最佳选项。
I do a lot of management training each year for the Circle K Company. Among the 1
we discuss in our classes is the 2 of quality employees(雇员).
“What has caused you to stay 3 enough to become a manager?” I asked. After a while a new manager took the 4 and said slowly, “It was a baseball glove.”
Cynthia said she used to
When Cynthia arrived for work the next morning, Partircia, the store manager asked her to come to her small office and handed her a box. “I overheard you 12 to your son yesterday,” she said, “and I know that it is 13 to explain things to kids. This is a baseball glove for Jessie. I know you have to pay bills 14 you can buy gloves. You know we can’t 15 good people like you as 16 as we would like to; but we do 17 and I want you to know how 18 you are to us .”
Cynthia’s story shows vividly that people 19 more how much a (n) 20 cares than how much he pays .
1.A.topics B.problems C.difficulties D.lessons
2.A.employing B.praising C.keeping D.improving
3.A.soon B.long C.strong D.calm
4.A.position B.decision C.question D.advice
5.A.take B.change C.lose D.consider
6.A.lighter B.easier C.better D.higher
7.A.letter B.call C.answer D.email
8.A.bought B.kept C.needed D.offered
9.A.complained B.explained C.understood D.admitted
10.A.short B.enough C.spare D.tight
11.A.food B.education C.clothes D.bills
12.A.talking B.crying C.arguing D.scolding
13.A.easy B.hard C.simple D.nice
14.A.after B.until C.when D.before
15.A.value B.remain C.pay D.fire
16.A.much B.many C.pleasant D.possible
17.A.regret B.agree C.worry D.care
18.A.excellent B.important C.thankful D.thoughtful
19.A.remember B.refuse C.thank D.realize
20.A.mother B.clerk C.official D.manager
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阅读下面短文,掌握其大意,然后从1―20各题所给的四个选项(A、B、C和D)中,选出最佳选项。
What is your favorite 1 ?Do you like yellow, orange or red? If you do, you must be an optimist(乐观者), a leader, an active person who enjoys life, people and 2 . Do you prefer grays and blues? Then you are 3 quiet, shy, and you’d rather 4 than lead. You tend to be a pessimist(悲观主义者).
Colors 5 our moods, there is no doubt about it. A yellow room 6 most people feel more cheerful and more 7 than a dark green one. It seems that a red dress brings warmth and cheer to the saddest winter day. 8 the other hand, black is depressing(压抑的). A black bridge 9 the River Thames, near London, used to be the scene of more suicides(自杀)than 10 bridge in the area―until it 11 green. The number of suicide attempts immediately fell sharply; perhaps it 12 even more if the bridge had been done 13 .
Pink or baby blue. Light and 14 colors make people 15 happier but 16 .It is an established fact 17 factory workers work better.
18 , and have 19 accidents when their machines are painted orange rather 20 black or dark gray.
1.A.game B.color C.idea D.friend
2.A.friends B.parents C.excite D.excitement
3.A.probably B.possible C.sure D.better
4.A.go forward B.come C.follow D.think
5.A.influenced B.don’t influence C.do influence D.effect
6.A.causes B.gets C.calls D.makes
7.A.relaxed B.relax C.nervous D.worried
8.A.At B.For C.By D.On
9.A.on B.over C.cross D.through
10.A.other B.any other C.any D.the other
11.A.painted B.is painted C.got D.was painted
12.A.would have fallen B.will fall C.would fall D.fell
13.A.with B.by C.in D.to
14.A.dark B.bright C.clear D.good
15.A.only B.not C.much D.not only
16.A.active B.more quiet C.more active D.much active
17.A.which B.how C.to us D.that
18.A.harder B.more hardly C.even hard D.however
19.A.little B.less C.fewer D.more
20.A.to B.than C.for D.not
27
阅读下面短文,掌握其大意,然后从1―20各题所给的四个选项(A、B、C和D)中,选出最佳选项。
The Florida sun baked my shoulders as I worked along the I―595 freeway near Fort Lauderdale, picking up rubbish. I paused to 1 the sweat off my forehead and look up at the cloudless blue sky. “ 2 can't it rain?”I thought. That would 3 things off.
I thought about my 4 , who were 5
sitting in an air-conditioned classroom at the high school right
now. I'd had some
We continued our 12 route (路线) along 595, 13 for the overpass bridge. Then I noticed an area where some 14 were broken on the ground. They weren't like that before.
“Dad! Pull over! I want to 15 something out. ”
I jumped off the truck and rushed to the bridge. Something was telling me to 16 . . . there wasn't much time. 17 I saw a Toyota that 18 upside down in the trees. Maybe it was a stolen car that somebody 19 there. Then I noticed something 20 . It was a bloody leg poking out of the driver's side window!
"H-e-l-p!" a lady moaned (呻吟).
1. A. wipe B. clean C. dry D. brush
2. A. When B. How C. Why D. How long
3. A. wash B. keep C. stay D. cool
4. A. relatives B. neighbors C. friends D. workmates
5. A. happily B. probably C. really D. finally
6. A. difficulty B. trouble C. questions D. problems
7. A. full-time B. part-time C. all the time D. some time
8. A. advantage B. possession C. position D. place
9. A. away B. from C. far D. clear
10. A. easy B. exciting C. smelly D. comfortable
11. A. knew B. wondered C. believed D. admitted
12. A. regular B. common C. unusual D. old
13. A. leaving B. going C. coming D. heading
14. A. cars B. bottles C. trees D. glasses
15. A. check B. turn C. make D. bring
16. A. decide B. hurry C. consider D. listen
17. A. Above B. Behind C. Ahead D. Below
18. A. hung B. pulled C. caught D. knocked
19. A. treasured B. deserted C. kept D. hid
20. A. pushing B. shouting C. moving D. crying
28
阅读下面短文,掌握其大意,然后从1―20各题所给的四个选项(A、B、C和D)中,选出最佳选项。
After graduation from Harvard Medical School, Dr. William Thomas never thought he’d work in a nursing home. Then, 1 , he became a medical director of a nursing home in New York, and his ideas began to 2 . “For the first time in my career, I was 3 for the answer to the question, What does it mean to 4 another person?”
5 that the biggest trouble facing nursing-home residents(居住者) are helplessness,
6 and boredom, he arranged laughter, usefulness and love as 7 .
8 Thomas calls it, he began the “”Edenization” of the nursing home in 1992. At last he founded the Eden Alternative.
Lazy moments and loud television programmes were 9 with lovely children, playful pets, 10 plants and music in the lobby. These living things are 11 into life. Residents are
12 to tend the animals, water the plants, weed outdoor gardens and do crarts with the children.
The Eden Altemative changed the 13 of the residents at this 80-bed nursing home. In a three-day study, the nursing home was 14 with a nursing home of equal size. The Eden Alternative had 26 percent less nurse-aide turnover, 15 percent 15 resident deaths and 3 percent lower medication costs.
In 1995 Dr.
Thomas 16 his full time to the promotion of the
Eden Alternative. More than 200 nursing homes throughout the country have 17
the Edenization process.
Thomas receives queries(质疑)from as 18
away as Turkey, Japan,
Brazil and the Netherlands. He hopes that his idea of filling “
1.A.unexpectedly B.surprisingly C.unhappily D.suddenly
2.A.wonder B.struggle C.shake D.change
3.A.asking B.answering C.caring D.searching
4.A.make B.visit C.tend D.care
5.A.Recognizing B.Hoping C.Regarding D.Including
6.A.loneliness B.poverty C.timelessness D.excitement
7.A.food B.reference C.treatment D.introduction
8.A.When B.As C.Unless D.since
9.A.went B.replaced C.began D.met
10.A.man-made B.plastic C.alive D.live
11.A.changed B.mixed C.divided D.made
12.A.got B.helped C.encouraged D.required
13.A.lives B.habits C.customs D.methods
14.A.compared B.covered C.dealt D.equipped
15.A.more B.less C.worse D.fewer
16.A.sent B.led C.devoted D.used
17.A.begun B.developed C.prevented D.invented
18.A.long B.much C.far D.soon
19.A.homeness B.homelessness C.plants D.pets
20.A.relation B.education C.match D.care
29
阅读下面短文,掌握其大意,然后从1―20各题所给的四个选项(A、B、C和D)中,选出最佳选项。
“Down-to-earth” means someone or something that is honest, practical and easy to deal with. It is 1 to find someone who is down-to-earth. A person who is down-to-earth is easy to talk to and 2 other people as equals. A down-to-earth person is just the 3 of someone who acts important and proud.
Down-to-earth persons 4 be important members of society, of course. 5 they do not let their importance “go to their heads”. They do not 6 themselves to be better persons than others of less importance. Someone who is filled with his own importance and pride, often without cause, is 7 to have “his nose in the air”. There is 8 way a person with his nose in the air can be down-to-earth.
Americans 9 &
天津市汉沽一中高三第三次月考试卷
化学 2008年11月
本试卷分第Ⅰ卷(选择题)和第Ⅱ卷(非选择题)两部分,考试时间100分钟,满分100分。
可能用到的相对原子质量:H
Cl 35.5 Fe 56 Cu 64
第Ⅰ卷(选择题 共58分)
1、环境污染问题越来越受到人们的关注,造成环境污染的主要原因大多是由于人类生产活动中过度排放有关物质引起的。下列环境问题与所对应的物质不相关的是 ( )
A、温室效应――二氧化碳 B、光化学污染――二氧化氮
C、酸雨――二氧化碳 D、臭氧层破坏――氟氯烃
2.Se是人体必需的微量元素。下列关于和
的说法,正确的是 ( )
A.二者互为同素异形体 B.二者属于同一种元素www.ks5u.com
C.和
的性质相同 D.
和
分别含有44和46个质子
3.在短周期元素中,若某元素原子的最外层电子数与电子层数相等,符合条件的元素种数为 ( )
A.1种 B.2种 C.3种 D.4种
4.下列实验中,颜色的变化与有关物质的强氧化性无关的是 ( )
A.乙烯使酸性高锰酸钾溶液褪色
B.过氧化钠使品红溶液褪色
C.氯气使鲜花褪色
D.SO2使滴有酚酞的红色NaOH溶液褪色
5.有NA表示阿伏加德罗常数的数值,下列说法正确的是 ( )
A.在标准状况下,VL水含有的氧原子个数为
B.常温时,
C.1molFeCl3跟水完全反应转化为氢氧化铁胶体后,其中胶体粒子的数目为NA
D.1molNH中含电子数为10NA
6.下列各组物质在适宜的条件下反应,其中氧化剂和还原剂的物质的量之比为2 :1的是
( )
A.CuO+CO B.H2SO4(浓)+C
C.Mg+CO2 D.Fe2O3+Al
7.有M、R两种主族元素,已知M2-离子与R+离子核外电子数之和为20,下列说法正确的是 ( )
A.若M在第3周期,则R一定在第2周期
B.M与R的质子数之和为20
C.M2-可能比R+的离子半径小
D.M与R的原子序数之差可能等于7
8.某研究性学习小组为了探索镁粉与FeCl3溶液的反应机理,做了如下两组实验:①将镁粉投入冷水中,未见明显现象;②将镁粉投入FeCl3y溶液中,观察到有气泡产生,溶液颜色逐渐变浅,同时逐渐产生红褐色沉淀。则下列有关镁与FeCl3溶液反应的叙述中,正确的是 ( )
A.镁只与FeCl3溶液中的Fe3+直接反应
B.气泡是镁与FeCl3溶液中的水直接反应产生的
C.红褐色沉淀是镁与水反应生成的Mg(OH)2与Fe3+反应所得
D.汽泡是镁与FeCl3水解生成的盐酸反应产生的
9、小华家中有如下生活用品:碘酒、食盐、食醋、84消毒液(内含NaClO),小华利用上述用品不能完成的任务是
A.检验买来的奶粉中是否加有淀粉 B.检验自来水中是否含有Cl-
C.除去保温瓶中的水垢 D.洗去白色衣服上的番茄汁
10、下面有关硅的叙述中,正确的是( )
A. 光导纤维是以硅酸盐为主要原料制成的
B.硅是构成矿物和岩石的主要元素,硅在地壳中的含量在所有的元素中居第一位
C.硅的化学性质不活泼,在自然界中可以以游离态存在
D.硅在电子工业中,是最重要的半导体材料
11.泽维尔用飞秒(时间单位:1飞秒=10-15秒)激光技术研究了氰化碘(ICN)的分解反应 ICN→I+CN,发现该变化可在200飞秒内完成。已知(CN)2和卤素的性质相似。以下有关ICN的叙述中正确的是( )
A ICN不能和NaOH溶液反应 B ICN是一种共价化合物
C 将ICN加入到氯水中可生成I2 D ICN的晶体是离子晶体
12.一些盐的结晶水合物,在温度不太高时就有熔化现象,即熔溶于自身的结晶水中,又同时吸收热量。它们在塑料袋中经日晒就熔化,又在日后缓慢凝结而释放热量。故可用于调节室内的温度,或作夏日防暑用枕垫或座垫,这些物质可称之为潜热材料。现有几种盐的结晶水合物有关数据如下:
①
②
③
④
熔点(℃)
40~50
29.92
32.38
35.1
溶化热
(kJ?mol-1)
49.7
37.3
77
100.1
根据上述数据,实际应用时最常采用的(由来源和成本考虑)应该是
A.① B.② C.③ D.④
13、蛇纹石由MgO、A12O3、SiO2、Fe2O3组成。现取一份蛇纹石试样进行实验,首先将其溶于过量的盐酸,过滤后,在所得的沉淀X和溶液Y中分别加入NaOH溶液至过量。下列叙述不正确的是
A.沉淀X的成分是SiO2
B.将蛇纹石试样直接溶于过量的NaOH溶液后过滤,可得到红色颜料Fe2O3,
C.在溶液Y中加入过量的NaOH溶液,过滤得到的沉淀的主要成分是Fe(OH)3和Mg(OH)2
D.溶液Y中的阳离子主要是Mg2+、Al3+、Fe3+、H+
14.实验室需配制一种仅含四种离子(不包括水电离出的离子)的无色混合溶液,且在混合溶液中四种离子的物质的量浓度均为lmol?L-1。下面四个选项中能达到此目的的是
A.NH4+、Na+、NO3-、Cl- B.Cu2+、K+、SO42―、NO3―
C.H+、K+、HCO3-、Cl― D.、K+ Na+、Cl―、SO42―
15.已知酸性条件下有如下反应:2Cu+=Cu2++Cu。由于反应温度不同,用氢气还原氧化铜时,可能产生Cu或Cu2O,两者都是红色固体。一同学对某次用氢气还原氧化铜实验所得的红色固体产物作了验证,实验操作和实验现象记录如下 ( )
加入试剂
稀硫酸
浓硫酸、加热
稀硝酸
浓硝酸
实验现象
红色固体
和蓝色溶液
无色气体
无色气体
和蓝色溶液
红棕色气体
和绿色溶液
由此推出本次氢气还原氧化铜实验的产物是
A.Cu B.Cu2O
C.一定有Cu,可能有Cu2O D.一定有Cu2O,可能有Cu
16.t℃时CuSO4的溶解度是S g,其饱和溶液密度d g.cm-3、物质的量浓度为c mol.L-1。向足量饱和溶液中加入m g无水CuSO4或蒸发掉n g水后恢复t℃,均能获得W g胆矾晶体,下列关系式正确的是( )
A. B.
C.
D.
17.有
A.肯定含①③,不含② B.肯定含①③,可能含②
C.肯定含②③,不含① D.肯定含②③,可能含①
18.某学生用NaHCO3,和KHCO3,组成的某混合物进行实验,测得如下数据(盐酸的物质的量浓度相等)
50mL 盐酸
50mL 盐酸
50mL 盐酸
m(混合物)
V(CO2)(标况)
则下列分析推理中不正确的是
A.盐酸的物质的量浓度为3.0mol?L
B.根据表中数据能计算出混合物中NaHCO3的质量分数
C.加入混合物
D.
19.在烧杯中加入铁和铜的混合物,然后加入一定量的稀硝酸,充分反应后,剩余金属的质量为m
A.m1可能等于m2 B.m1一定等于m2
C.m1可能大于m2 D.m1一定大于m2
第Ⅱ卷(非选择题 共42分)
20.(9分)饱和氯水与石灰石的反应是制取较浓的HclO溶液方法之一。某同学运用这一方法,尝试制取HC1O溶液并进行了如下定性实验:
①在试管中加入过量的块状碳酸钙,再加入约20mL饱和氯水,充分反应,有少量气泡产生,溶液的黄绿色褪去;
②过滤,将滤液滴在有色布条上,发现其漂白性更强;
③为了确定反应产物,将滤液分为三份,分别进行以下实验;
第一份与石灰水混合,立即产生大量白色沉淀;
第二份与稀盐酸混合,立即产生大量气泡;
第三份加热,看到溶液变浑浊且有大量无色气体产生;
经检测,上述实验中产生的无色气体均为CO2气体。
(1)试解释可以在饱和氯水中加入石灰石制备HclO的原因
。
(2)写出步骤③中第一份及第二份滤液发生反应的离子方程式:
第一份: 。
第二份: 。
(3)试根据所学知识推测,在②的滤液中含 有的溶质,除了溶解的极少量氯气外,还含有的其它溶质为(写化学式) 。
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