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2017年英语高考答案,2017英语高考答案江西

tamoadmin 2024-07-16 人已围观

简介1.2017年江西高考第三批分数线是多少?2.2017高考英语语法填空分类试题3.高考英语阅读理解训练附答案4.2017年江西高考状元是谁?2017年江西高考状元分数是多少5.2017年江西高考化学一轮模拟试题及答案6.江西历年高考录取率一览表其他信息:(一)遵守中华人民共和国宪法和法律、具有高级中等教育学校(包括普通高中、中专学校、职业高中、技工学校,下同)毕业或具有同等学力、身体状况符合相关要

1.2017年江西高考第三批分数线是多少?

2.2017高考英语语法填空分类试题

3.高考英语阅读理解训练附答案

4.2017年江西高考状元是谁?2017年江西高考状元分数是多少

5.2017年江西高考化学一轮模拟试题及答案

6.江西历年高考录取率一览表

2017年英语高考答案,2017英语高考答案江西

其他信息:

(一)遵守中华人民共和国宪法和法律、具有高级中等教育学校(包括普通高中、中专学校、职业高中、技工学校,下同)毕业或具有同等学力、身体状况符合相关要求,并具备下列条件之一的人员可在江西省申请报名: 1、具有江西省户籍(省外迁入时间要求:家庭户口不晚于2022年10月31日,集体户口不晚于2020年10月31日); 2、外省户籍在江西就业人员随迁子女(以下简称“随迁子女”),须取得江西省高中阶段学籍并实际就读一年以上(截至2022年9月); 3、具有江西省高级中等教育阶段连续三年学籍; 4、在江西省定居的外国人; 5、取得少年班报考资格等符合教育部有关规定的其他人。 (二)“三校生”对口招生报名要求: 1、经省教育厅、省人力和社会保障厅批准面向省内初中毕业生招收的中专学校、职业高中、技工学校(中级工班)应届毕业生(以下简称“三校生”)可以报考“三校生”对口招生或统一高考,但二者不能同时兼报。往届毕业生(含一年制中职生)及技工院校高级工班、预备技师班毕业生不得报考“三校生”对口招生,符合条件的可以报考统一高考。 2、跨省招收的“三校生”不得报考对口招生。 (三)下列人员不得报名: 1、具有普通高等学历教育资格的高校在校生,或已被普通高校录取并保留入学资格的学生; 2、高级中等教育学校非应届毕业的在校生(不含取得高校少年班、数学英才班等报考资格的学生); 3、在高级中等教育阶段非应届毕业年份以弄虚作手段报名并违规参加普通高考(包括全国统考、省级统考和高校单独组织的招生考试)的应届毕业生; 4、已在省外参加2023年普通高考报名的考生; 5、因违反国家教育考试规定,被给予暂停参加普通高考处理且在停考期内的人员; 6、因触犯刑法已被有关部门取强制措施或正在者,其中,未成年人按相关法律规定执行。 (四)不接受考生在本省或外省借考。

2017年江西高考第三批分数线是多少?

2017年江西异地高考政策还没有出来,应该和2016保持一致:

2016江西异地高考政策:随迁子女高考条件

(一)有本省户籍且符合下列条件的人员,可以申请报名:

1.遵守中华人民共和国宪法和法律;

2.高级中等教育学校毕业或具有同等学力;

3.身体状况符合相关要求。

(二)外省籍进城务工人员随迁子女符合第(一)条第1、2、3款所述条件,在江西省报名参加高考,须在江西省高中阶段具有一年以上(截至2015年9月)学习经历并取得学籍。可到学籍地(或居住地)县(区)招考办申请报名。

2017高考英语语法填空分类试题

江西省已经将三本院校合并到二本批次招生,已经没有第三批分数线了。

2017年江西省高考各批次分数线为:

第一批本科文史类533分、理工类503分;

第二批本科文史类458分、理工类422分;

高职(专科)文史类180分、高职(专科)理工类180分;

高考英语阅读理解训练附答案

 语法填空题作为一种新型题目,重点考察的是学生的词汇掌握能力、词语辨析、单句理解能力,这就对学生英语综合能力的应用提出了更高的要求。要下面是我为大家推荐的2017高考英语语法填空分类试题,仅供大家参考!

 高考英语语法填空分类试题

 一、考查词形转换

 1. He must be (mental) disabled.

 2. His teacher took a deep drink, smiled (warm), and thanked his student very much for the sweet water.

 3. We drank together and talked (merry) till far into the night.

 4. One Sunday morning in August I went to a local musical festival. I left it early because I had an ointment (late) that day.

 5. This proverb is saying we he to let things go in their (nature) course.

 6. But Jane knew from past experience that her (choose) of ties hardly ever pleased her father.

 7. Mary felt (please), because there were many empty seats in the room.

 8. ?That would be a very (reason) thing to do in a big city, but it could destroy a small village like ours,? Nick said.

 9. ?But such a small thing couldn?t (possible) destroy a village.?

 参考答案:1. mentally 2.warmly 3.merrily 4.later 5.natural

 6.choice7. pleased 8.reasonable 9.possibly

 二、考查非谓语动词

 1. He spit it out, (say) it was awful.

 2. I got on the bus and found a seat near the back, and then I noticed a man (sit) at the front.

 3. He suddenly eared in class one day, (wear) sun glasses.

 4. ?In the beginning, there was only a very small amount of unfairness in the world, but everyone added a little, always (think) that it was only small and not very important, and look where we he ended up today.?

 5. While she was getting me (settle) into a tiny but clean room, the head of the village was tying up his horse to my car to pull it to a small town some 20 kilometers away where there was a garage.

 6. For example, the proverb, ?plucking up a crop (help) it grow?, is based on the following story.

 7. She wished that he was as easy (please) as her mother, who was always delighted with perfume.

 参考答案 1-7: saying sitting wearing thinking settled to help to please

 三、考查谓语动词时态及语态

 1. The sun was setting when my car (break) down near a remote and poor village.

 2. Besides, shopping at this time of the year was not a pleasant experience: people stepped on your feet or (push) you with their elbows (肘部), hurrying ahead to get to a bargain.

 3. He walked in as if he (buy) the school.

 4. Her mother was excited. ?Your father has at last decided to stop smoking,? Jane____ (inform).

 5. Suddenly, he (find) that he had run out of salt.

 参考答案 1-5 :broken pushed had bought was informed found

 四、考查形容词或副词的比较级

 1. The teacher replied, ?You tasted the water. I tasted the gift. The water was simply the container for an act of kindness and love. Nothing could be (sweet).?

 2. He was very tired after doing this for a whole day, but he felt very hy since the crop did ?grow? (high).

 3. It might he made it a little (hard) for everybody because it meant they had to turn around, but that didn?t stop the kids in the class.

 参考答案 1-3 :sweeter higher harder

 高考英语语法填空答题技巧

 一、已给单词提示题型的技巧

 此类题可以考查学生对单词形式变化的掌握程度。单词形式变化主要有两种,一是词的形、数、式的变化,一是词的派生变化。在判断出词的变化之后还应该进一步审题,看是否需要使用复合的变化形式,这一点是很重要的。

 技巧一:名词形式变化。

 名词的形式变化主要有单数、复数、所有格的变化。

 例:There are many students living at school,the(child) houses are all far from schoo1.

 由students一词可以判断出横线处应填复数,且作为houses的定语,所以应用其所有格形式,故答案为child的复合变化形式? 复数的所有格children?s。

 技巧二:动词形式变化。

 动词的形式变化比较多,有谓语的变化(时态、语态、语气),有非谓语的变化(不定式、动名词、现在分词、过去分词)。

 例:A talk(give) tomorrow is written by Professor Zhang.

 句中的is written是整句的谓语,所以横线所在的动词应当用作非谓语。从tomorrow可以看出,报告是?将来?作的,故用不定式;且报告是give动作的承受者,故可以判断出横线所在处用give的不定式被动式?to be given。

 技巧三:代词形式变化。

 代词形式变化通常是与人称变化有关的三大类五小类,即人称代词(主格和宾格)、物主代词(形容词性和名词性)、反身代词。另外还有几个不定代词的形式变化,如no one/none、other/another等。

 例:The king decided to see the painter by(he).

 由介词by可以看出,横线处应填反身代词himself。

 技巧四:形容词、副词比较级变化。

 英语中大部分形容词和表方式的副词都有原级、比较级和最高级的变化。构成比较级和最高级的方式,或通过加后缀一er和.est,或在词前Imore/less和most/least,且形容词的最高级还要冠以the。

 例:I am (tall)than Liu Wen.He is the tallest students in my class.

 此题后句交代了LiuWen是班上最高的学生,那?我?肯定比他矮,所以不能用taller,只能用表示程度不如的?less tall?。

 技巧五:数词形式变化。

 数词的形式变化包括基数词、序数词,或加后缀一、ty的变化,甚至还有作分母用的序数词的单复数形式,以及one/two的特殊变化形式 once/twice

 例:To my three sons I lee my seven horses.My eldest son shall take a half,my second son shall take a (three).

 从上下文连续起来理解,这是一个分马的,大儿子分得a half,也就是?一半?或?二分之一?,那么二儿子应该得?三分之一?,所以要填入作分母的序数词?third?才能命中目标。

 技巧六:词的派生。

 词的派生现象在英语单词中是很常见的,派生现象主要发生在名词、动词、形容词、副词四种词中。这种题型还有可能检测学生对词根、前后缀、派生词的掌握。

 例:Lious lost his wallet yesterday,SO he was very____(hiness).

 在这道题中,学生很容易判断出该用形容词;钱包丢了,人应该是不开心的,所以要再加个前缀un,就成了unhy。

2017年江西高考状元是谁?2017年江西高考状元分数是多少

2017高考英语阅读理解训练附答案

 2017高考英语改革后实行一年两考,可多次参加,我认为对自己有信心的.同学可以早点参加,取得理想的成绩后就可以把学习重心放到其他科目上。为了帮助大家备考,我整理了一些高考英语阅读理解,希望能帮到大家!

 history

 If we were asked exactly what we were doing a year ago,we should probably he to say that we could not remember But if we had kept a book and had written in it an account of what we did each day,we should be able to give an answer to the question.

 It is the same in history Many things he been forgotten because we do not he any written account of them Sometimes men did keep a record of the most important henings in their country,but often it was destroyed by fire or in a war.Sometimes there was never any written record at all because the people of that time and place did not know how to Write.For example,we know a good deal about the people who lived in China 4,000 years ago, because they could write and lee written records for those who lived after them.But we know almost nothing about the people who lived even 200 years ago in central Africa. because they had not learned to write. Sometimes.of course,even if the people cannot write,they may know something of the past.They he heard about it from older people,and often songs and dances and stories he been made about the most important henings,and these he been sung and acted and told for many generations For most people are proud to tell what their fathers did in the past.This we may call ?remembered history?.Some of it has now been written down. It is not so exact or so valuable to us as written history is,because words are much more easily changed when used again and again in speech than when copied in writing.But where there are no written records,such spoken stories are often very helpful.

 41. Which of the following ideas is not suggested in the passage?

 A.?Remembered history?,compared with written history,is less reliable

 B.Written records of the past play the most important role in our learning of the human history.

 C.A written account of our daily activities helps US to be able to answer many questions.

 D.Where there are no written records.there is no history.

 42.We know very little about the central Africa 200 years ago because

 A.there was nothing worth being written down at that time

 B .the people there ignored the importance of keeping a record

 C.the written records were perhaps destroyed by a fire

 D.the people there did not know how to write

 43.?Remembered history?refers to

 A.history based on a person?s imagination

 B .stories of important henings passed down from mouth to mouth

 C .songs and dances about the most important events

 D .both B and C

 44.?Remembered history?is regarded as valuable only when

 A. it is written down

 B .no written account is ailable

 C.it proves to be time

 D.people are interested in it

 45 .The passage suggests that we could he learned much more about our past than we do now if the ancient people had

 A.kept a written record of every past event

 B. not burnt their written records in wars

 C.told exact stories of the most important henings

 D.made more songs and dances

 答案:DDDBA

 land produces

 Although the United States covers so much land and the land produces far more food than the present population needs,its people are by now almost entirely an urban society Less than a tenth of the people are engaged in agriculture and forestry(林业),and most of the rest live in or around towns,small and large.Here the traditional picture is changing:every small town may still be very like other small towns,and the typical small town may represent a widely accepted view of the country,but most Americans do not live in small towns any more.Half the population now lives in some thirty metropolitan areas(1arge cities with their suburbs、of more than a million people each?a larger proportion than in Germany or England,let alone France.The statistics(统计)of urban and rural population should be treated with caution because so many people who live in areas classified as rural trel by car to work in a nearby town each day.As the rush to live out of town continues.rural areas within reach of towns are gradually filled with houses,so that it is hard to say at what moment a piece of country becomes a suburb But more and more the typical American lives in a metropolitan rather than a small town environment.

 36.If now America has 250 million people.how many of them are engaged in agriculture and forestry?

 A.About 25 million.

 B.More than 25 million.

 C.Less than 25 million.

 D. Less than 225 million

 37.Which of the following four countries has the smallest proportion of people living in metropolitan areas?

 A.United States.

 B.Germany.

 C.France.

 D.England.

 38.What?s the meaning of the word?metropolitan?in the middle of the passage?

 A .Of a large city with its suburbs.

 B.Of small and large towns.

 C.Of urban areas.

 D.Of rural areas.

 39.According to the passage,what can we learn about small towns in the United States?

 A Most small towns become gradually crowded

 B.Small towns are still similar to each other.

 C.As the traditional picture is changing,towns are different.

 D .Small towns are turning into large cities

 40.Why is it hard to say when a piece of country becomes a suburb?

 A.Because they are the same.

 B.Because the rush takes place too quickly

 C.Because the process is gradual.

 D.Because more and more Americans live in metropolitan

 答案:CCABC

 president

 There are stories about two U.S . presidents,Andrew Jackson and Martin Van Buren,which attempt to explain the American English term OK.We don?t know if either story is true,but they are both interesting. The first explanation is based on the fact that President Jackson had very little education.In fact,he had difficulty reading and writing.When important papers came to Jackson,he tried to read them and then had his assistants explain what they said.If he roved of a paper.he would write?all correct?on it.The problem was that he didn?t know how to spell.So what he really wrote was?ol korekt?.After a while,he shortened that term to?OK?.

 The second explanation is based on the place where President Van Buren was born,Kinderhook,New York.Van Bnren?s friends organized a club to help him become President They caned the club the Old Kinderhook Club,and anyone who supported Van Buren was called?OK?.

 31.The author

 A. believes both of the stories

 B.doesn?t believe a word of the stories

 C is not sure whether the stories are true

 D. is telling the stories just for fun

 32. According to the passage,President Jackson

 A.couldn?t draw up any documents at all

 B. didn?t like to read important papers by himself

 C.often had his assistants sign documents for him

 D .wasn?t good at reading,writing or spelling

 33.According to the first story, the term ?OK?

 A. was roved of by President Jackson

 B.was the title of some Official documents

 C.was first used by President Jackson

 D.was an old way to spell?all correct?

 34 .According to the second story,the term?OK?

 A.was the short way to say?old Kinderhook Club?

 B.meant the place where President Van Buren was born

 C.was the name of Van Buren?s club

 D.was used to call Van Buren?s supporters in the election

 35.According to the second story.the term?OK?was first used

 A.by Van Buren

 B.in a presidential election

 C.to organize the Old Kinderhook Club

 D.by the members of the?Old Kinderhook Club?

 答案:CDCDB

;

2017年江西高考化学一轮模拟试题及答案

6月23日,江西高考成绩放榜,2017江西高考状元出炉:临川一中的刘浩捷、广丰中学汤方淼两位同学均以总分700分的优异成绩并列全省理科总分第一名。

丰城中学的金淼以总分675分的优异成绩位列全省文科总分第一名。

2017江西高考理科状元刘浩捷具体考分情况为:数学150分,语文137分,英语140分,理综273分,总分700分;

2017江西高考理科状元汤方淼具体考分情况为:数学147,语文132,英语144,理综277分(物理100,化学100,生物77),总分700。清华大学自主加分40分,全省高考首个双料状元。

2017江西高考文科状元金淼具体考分情况问:语文133分,数学147分,英语139分,文综256分;

江西历年高考录取率一览表

1.化学与生活密切相关,下列有关说法错误的是( )

AAl(OH)3是某些胃药的一种成分

B乳酸铁是某些补铁口服液的有效成分

C臭氧可以作为新型自来水消毒剂

DSO2常用作红葡萄酒中杀菌消毒剂

分值: 3分 查看题目解析 >

2

2.下列反应不能用离子方程式“H++OH-=H2O”表示的是( )

AH2SO4溶液与NaOH溶液混合

BHCl气体通人Ca(OH)2溶液中

CHNO3溶液与KOH溶液混合

DNH4HSO4溶液与NaOH溶液混合

分值: 3分 查看题目解析 >

3

3.下列叙述错误的是( )

A胶体化学可用于制备纳米材料

B钛合金主要用于尖端领域

C压电陶瓷可实现化学能与电能的转化

D稀土元素大大改善合金性能被称为冶金工业的维生素

分值: 3分 查看题目解析 >

4

4. 下列有关实验操作的叙述错误的是( )

A过滤操作中,玻璃棒应适时搅拌漏斗器

B蒸发时,不能把蒸发皿放置于石棉网上加热

C萃取分液时,将塞上凹槽或小孔对准漏斗上小孔,然后打开活塞才能放出下层液体

D配制容量瓶,定容时改用胶头滴管滴加蒸馏水

分值: 3分 查看题目解析 >

5

5.能证明Fe(NO3)3中铁元素具有氧化性的实验事实是( )

A通人H2S,有**沉淀

B加入铜粉,溶液变为蓝色

C加人锌粉,溶液棕**逐渐消失

D滴加NaHCO3溶液,有气体和红棕色沉淀生成

分值: 3分 查看题目解析 >

6

6. 一定条件下,某容器中各微粒在反应前后变化的示意图如下,其中·和○代表不同元素的原子。关于此反应判断错误的是( )

A可能是双氧水分解反应

B充分反应后,还有物质,则属于可逆反应

C反应前后,一定是共价键的断裂与生成

D反应方程式可表示为:

分值: 3分 查看题目解析 >

7

7.设NA为阿伏加德罗常数值,下列有关叙述正确的是( )

A28gMgCO3和NaHCO3混合固体中的CO32-离子数为NA

BlmolI2与4molH2反应生成的HI分子数为2NA

C1molAl溶于含1molNaOH溶液,电子转移数为3NA

D标准状况下,2.24LH2O含有的共价键数为0.2NA

分值: 3分 查看题目解析 >

8

8.下列实验操作能达到实验目的的是( )

A

B

C

D

分值: 3分 查看题目解析 >

9

9.下列有关物质的性质与用途具有对应关系的是( )

ASiO2熔点高,可用作光导纤维

BLi还原性强且质轻,常用作负极材料

CFe2(SO4)3具有氧化性,能用作净水剂

DSO2能杀菌,可用于漂白纸浆

分值: 3分 查看题目解析 >

10

10.向含有Cu2(OH)2CO3固体的溶液中滴加少许浓盐酸(忽略体积变化),下列数值变大的是( )①c(CO32-)②c(Cu2+)③c(Cl-)④c(OH-)⑤c(H+)

A②③⑤B①③⑤C③④⑤D①②④

分值: 3分 查看题目解析 >

11

11.下列对物质或离子的检验,结论正确的是( )

A加入KSCN溶液,溶液变红,证明原溶液含有Fe3+

B将气体通入KMnO4酸性溶液,紫色褪色,证明气体为乙烯

C将气体通入澄清石灰水,有白色沉淀,证明气体为CO2

D加入BaCl2溶液,沉淀不溶于盐酸,证明原溶液含有SO42-

分值: 3分 查看题目解析 >

12

12.如图,缓慢通入O2,用水吸收NO2(设每次通入的O2能完全反应)。下列说法正确的是( )

A当试管内溶液的pH值不再变化,说明NO2全部转化为HNO3

B当试管气体不是红棕色时,说明NO2全部转化为HNO3

C水槽内的水改为稀盐酸,有利于吸收NO2

D水槽内的水改为稀NaOH溶液,有利于吸收NO2

分值: 3分 查看题目解析 >

13

13.有反应:3C+SiO2SiC+2CO,下列说法正确的是( )

ASiC是氧化产物

B还原剂与氧化剂的物质的量之比为1:2

C若生成4.48LCO,则转移0.4 mol 电子

DC 既是氧化剂又是还原剂

分值: 3分 查看题目解析 >

14

14. 0.1molCu、0.lmolH2SO4、0.1lmolHNO3混合共1L,充分反应,下列预测正确的是( )

A铜全部溶解,且溶液为蓝色,有红棕色气体产生

B铜部分溶解,且溶液为蓝色,有红棕色气体产生

C铜全部溶解,且溶液为蓝色,有无色气体产生

D铜部分溶解,且溶液为蓝色,有无色气体产生

分值: 3分 查看题目解析 >

15

15.实验室从含氯化钠、硝酸钾混合液中提取KNO3的过程如下图所示。下列分析正确的是( )

A

B

C

D

分值: 3分 查看题目解析 >

简答题(综合题) 本大题共55分。简答应写出文字说明、证明过程或演算步骤。

16

含同一元素的常见物质A、B、C,有如下转化关系(条件未标注):

16.当甲是KOH时,白色沉淀B为_________。

17.当甲为H2O时,气体B为__________。

18.当A为Na时,单质甲为____________。

19.当A为NH3时,气体单质B为___________。

分值: 7分 查看题目解析 >

17

下面是工业利用铝土矿(含杂质SiO2、Fe2O3)制取铝的工艺流程,回答有关问题:

20.铝土矿磨碎化浆,利用胶体粒子的性质,通入直流电除去_____,制得50%铝土矿。

21.操作I的名称是______,实验室进行此操作所需玻璃仪器为________。

22.加入NaOH所发生的离子反应方程式为_________,滤渣一为_______(填化学式)。

23.电解槽用石墨作阳极,生成二氧化碳的原因是__________。

分值: 9分 查看题目解析 >

18

处理生活污水中的NH4+,过程如下:

24.空气将NH4+转变为NO3-或NO2-,溶液pH__________(填“增大”、“减小”或 “不变”)。

25.根据较新的研究表明,将只含NO2-的污水与含NH4+的污水按比例混合,直接转化为无毒气体,该气体为_________。此方法的优点是__________。

26.完全处理含1mol NH4+污水,则n(O2)与n(CH3OH)关系式为_______[以n(O2)与n(CH3OH)表示]。

分值: 8分 查看题目解析 >

19

某班同学用如下实验探究Na2CO3、NaHCO3的性质。回答下列问题:

27.甲组同学分别取1.0g Na2CO3、NaHCO3固体,各滴加几滴水,发现盛Na2CO3的试管温度上升,而盛NaHCO3的试管温度下降;原因是__________。

28.乙组同学分别取0.1mol/L Na2CO3、0.1mol/LNaHCO3的溶液,用0.1mol/LHCl溶液滴定,pH变化与盐酸体积的关系如图所示:

① 碳酸钠与盐酸反应pH有两次突变,达到两次反应终点,分别是______(填A、B、C、D或E)。

② B点的主要溶质是_________(用化学式表示)。

③ B点______(填“大于”或“小于”) D点的pH,主要原因是_____________。

29.丙组同学预测NaHCO3有酸性,向其溶液加入镁粉,发现有气泡和沉淀生成,写出化学方程式:___________________________。

分值: 11分 查看题目解析 >

20

实验是进行科学探究的主要方法。回答下列问题:

30.实验室利用A 发生装置制备的常见气体有___________。

31.检验装置B的气密性方法是______________。

32.收集一瓶纯净氯气,选择上图装置,按气流方向,用小写字母表示连接顺序_______(装置不重复使用)。实验室检验氯气的方法是__________。

33.某实验小组按顺序连接adcfeg制取并收集氨气,导致实验失败,原因是_________。

分值: 10分 查看题目解析 >

21

H2O2是绿色氧化剂,且酸性介质下有更强的氧化性;易溶于水显弱酸性,常温下K1=1×10-12,K2=1×10-25。回答下列问题:

34.常温下水的电离平衡常数K约为________,K、K1、K2从大到小顺序为________。

35.在硫酸亚铁存在条件下,H2O2溶液可以把苯(C6H6)氧化为苯酚(C6H5OH)。反应后的混合物经过______、蒸馏得到苯酚;理论上制取1mol苯酚需要消耗H2O2_______mol,实际消耗大于理论用量的主要原因是________________。

36.K4[Fe(CN)6](**溶液)、K3[Fe(CN)6](黄绿色溶液)与一定量H2O2组成的混合物,用酸或碱调节混合溶液的pH,会出现**、黄绿色交替变化。按照从酸性至碱性的顺序,可观察到的现象是______________。

37.工业用H2O2除去废水中的Cl2,氧化产物是______;与SO2除Cl2相比,其优点是________。

21 第(1)小题正确答案及相关解析

正确答案

56×10﹣14 K1>K>K2

解析

常温下水的Kw=1×10﹣14,则电离平衡的常数K约为56×10﹣14,H2O2的K1=1×10﹣12,K2=1×10﹣25,K、K1、K2从大到小顺序为K1>K>K2,

故答案为:56×10﹣14;K1>K>K2;

考查方向

化学平衡常数;水的电离平衡常数

解题思路

常温下水的电离平衡的常数K约为56×10﹣14,H2O2的K1=1×10﹣12,K2=1×10﹣25;

易错点

本题考查化学平衡常数的大小比较,掌握化学平衡常数的表示方法是解题的关键,难度不大。

21 第(2)小题正确答案及相关解析

正确答案

分液 1 苯酚不稳定易被氧化

解析

发生H2O2+C6H6C6H5OH+H2O,苯酚、苯与水分层,反应后的混合物经过分液、蒸馏得到苯酚,由反应可知,理论上制取1mol苯酚需要消耗H2O2 为1mol,实际消耗大于理论用量的主要原因是苯酚不稳定易被氧化,则消耗的过氧化氢就多,

故答案为:分液;1;苯酚不稳定易被氧化;

考查方向

物质的分离与提纯;化学计量的计算;物质的性质与用途

解题思路

发生H2O2+C6H6C6H5OH+H2O,苯酚、苯与水分层,苯酚不稳定易被氧化;

易错点

本题考查物质的分离与提纯,同时涉及到相关计算,根据物质的性质结合题意分析即可,注意基本实验操作的整理,难道不大。

21 第(3)小题正确答案及相关解析

正确答案

溶液由黄绿色变为**

解析

由2H++[Fe(CN)6]4﹣(**溶液)+H2O2?[Fe(CN)6]3﹣(黄绿色溶液)+2H2O,酸性条件下平衡正向移动,碱性条件下平衡逆向移动,则按照从酸性至碱性的顺序,可观察到的现象是溶液由黄绿色变为**,

故答案为:溶液由黄绿色变为**;

考查方向

溶液酸碱性对物质性质的影响

解题思路

由2H++[Fe(CN)6]4﹣(**溶液)+H2O2?[Fe(CN)6]3﹣(黄绿色溶液)+2H2O,酸性条件下平衡正向移动,碱性条件下平衡逆向移动;

易错点

本题考查溶液酸碱性对物质性质的影响,掌握常见物质的性质是解题的关键,注意灵活分析题目所给信息,难度不大。

21 第(4)小题正确答案及相关解析

正确答案

O2 过量除杂试剂H2O2不会排出有毒气体,且废水酸性较弱

解析

用H2O2除去废水中的Cl2,发生H2O2+Cl2=2HCl+O2可知,O元素失去电子,对应氧化产物为O2,SO2除去废水中的Cl2,发生Cl2+SO2+2H2O=H2SO4+2HCl,则与SO2除Cl2相比,其优点是过量除杂试剂H2O2不会排出有毒气体,且废水酸性较弱,

故答案为:O2;过量除杂试剂H2O2不会排出有毒气体,且废水酸性较弱。

考查方向

氧化还原反应的本质;物质的性质与用途

解题思路

结合H2O2+Cl2=2HCl+O2、Cl2+SO2+2H2O=H2SO4+2HCl分析;

易错点

本题考查物质的性质与用途,涉及氧化还原反应的相关知识,掌握基础知识结合题目回答即可,难度不大。

其他信息:

江西2019高考报名人数达42.1万,比2018年增加3.9万人,是近几年来考生人数最多的一年。2018年,我省高考报名人数达到了38.2万人。 2019年江西省普通高考报名人数达42.1万人,比2018年增加3.9万人,是近几年来考生人数最多的一年。 近日,由江西省教育考试院主办的2019年“高考直通车”政策宣讲咨询活动正式启动,一支由来自省内外高校、教育行政部门、招生考试机构、中学等单位的负责人及专家组成的团队,奔赴全省各地开展高招政策宣讲。 在2018年全省教育工作会议上,省教育厅厅长叶仁荪表示,在全国多省高考报名人数出现下降的情况下,江西省普通高考报名人数继续增长,达到了38万人。 最近两年,江西省进一步减少和规范了高考加分项目和分值,扩大平行志愿,优化批次结构,2016年高考录取率为81.31%,2017年高考录取率达82.57%。2017年,江西省高考报名人数达到了36.3万人。

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