问题 填空题

下图由短周期元素形成的物质之间的转化关系,其中A、D、L为单质,其他为化合物.其中化合物I、J、K中含有两种相同的元素,G和I的反应⑤是一种重要化工生产中的主要反应之一.B常温下为液态化合物,F是一种直线型的非极性气体分子.

试回答下列有关问题:

(1)以上7个化学反应属于自身氧化还原反应的是______ (用编号①→⑦填写)

(2)在G、J、H中含有相同的元素是______;

(3)J的水溶液和F______填写”能”或”否”)发生反应,其理由是______

(4)反应⑤的化学方程式是______.

(5)写出电解溶液H的阴极电极反应方程式是______.

答案

“G和I的反应⑤是一种重要化工生产中的主要反应之一”.然后看G和盐酸反应的生成物,为三种,所以初步鉴定,G为弱酸含氧盐.生成物为,H为氯酸盐,因为B常温下为液态化合物,所以是水B为水,F为二氧化碳; G是碳酸钠,B是水,F是二氧化碳,I是二氧化硅,J是硅酸钠,H是两个反应的共同产物,故为NaCl,K为H2SiO3;依据转化关系,C为NaOH,A、D、L为单质,A和B反应生成氢氧化钠和L,则A为Na,L为H2,A和D反应生成E,E和F生成碳酸钠和D,推断为E为Na2O2,D为O2

(1)根据推断可知①是置换反应,②是化合反应,③是氧化还原反应,④是复分解反应,⑤是复分解反应,⑥是复分解反应,⑦是复分解反应,所以发生自身氧化还原反应的是过氧化钠和二氧化碳的反应为③,故答案为:③;

(2)在G为Na2CO3、J为Na2SiO3、H为NaCl,所以三种物质中含有相同的元素是Na,故答案为:Na;

(3)J(Na2SiO3)的水溶液和F(CO2)反应生成碳酸钠和硅酸,反应的理由是较强酸制较弱的酸,故答案为:能  较强酸制较弱的酸;

(4)反应⑤是二氧化硅和碳酸钠在高温条件下反应生成硅酸钠和二氧化碳,反应的化学方程式是:SiO2+Na2CO3

 高温 
.
 
Na2SiO3+CO2↑;故答案为:SiO2+Na2CO3
 高温 
.
 
Na2SiO3+CO2↑;

(5)电解溶液H(NaCl)的阴极电极反应方程式是:2H2O+2e-=2OH-+H2↑;故答案为:2H2O+2e-=2OH-+H2↑.

单项选择题
阅读理解

阅读理解

     Across the United States, there are several places where two independent towns grew together to

become one city-but kept both their names.

     WinstonSalem is one of them. It's a midsized city in what'scalled the plateau(high land), between the

Atlantic Coast and the inland mountains in the state of North Carolina. TheWinston part is a relatively

new place, founded early last century. It's home to the nation's biggest openair tobacco market.

     The giant R. J.Reynolds Tobacco Company's headquarters is in WinstonSalem, and Winston is the

name of one of Reynolds' bestknown cigarette brands. Fastgrowing Winston soon surrounded the much

older town of Salem, so in 1913, people in the area voted to combine them into a single place.

      From a historical and tourist point of view, Salem, or Old Salem, as it's called today, is the interesting

and unusual part of town.

      Salem was founded in the 1700s by the Moravians. They spoke German, and their community was

religiously based, with single men and single women living apart in separate dormitories. The Moravians

greatly valued women's work and brainpower. In fact, one of the nation's oldest boarding schools for

young women-the Moravians' Salem Academy founded in 1772-is still in operation.

      Over the years, Salem lost its Moravian character.That all changed, though, when a nonprofit group

began to rehabilitate the historic area.These days Old Salem is what's called a living history museum,

with exhibits, music, and tours of 18thcentury houses, taverns and Moravian dormitory buildings just

seven blocks from the tallest skyscraper in WinstonSalem.

     The historic community is booming again.Just as R. J.Reynolds is taking in millions of dollars making

cigarettes across town, Old Salem is generating about DS| 15 million a year in tourism revenue and

donations.

1. From the passage we can know that________.

A. WinstonSalem is the name of a city

B. Salem is home to the tobacco market

C. the city WinstonSalem has two names

D. Old Salem is the name of a tobacco brand

2. It can be inferred from Paragraph 3 that ________.

A. the two cities benefited each other

B. Salem developed faster than Winston

C. R.J.Reynolds Company has moved into Salem

D. the combination meets the wishes of the people

3. The city Salem is special for its________.

A. boarding school                

B. lifestyle and tradition

C. respect for brainpower                  

D. religious belief

4. The underlined word"rehabilitate"in Paragraph 6 is closest in meaning to "________".

A. reconstruct                          

B. evaluate

C. enlarge                              

D. decorate

5. What will probably be talked about in the following part?

A. Some other attractions in WinstonSalem.

B. How Winston makes profits from tourism.

C. Other examples of cities combined by two parts.

D. Something about the boarding school for women.