问题 填空题

已知可简写为。现有某化合物x的分子结构可表示为

(1)X的分子式为                        

(2)X的一氯代物有             种。

(3)下列有关X的说法不正确的是            (填编号)。

a.能发生还原反应

b.能发生氧化反应

c.能发生加聚反应

d.等质量的X与乙炔分别完全燃烧所消耗的氧气量,前者大

(4)X属于            (填编号)。

a.芳香烃    b.环烃    c.不饱和烃    d.炔烃

(5)写出两种X的同分异构体的键线式:                  

答案

(共12分)

(1)C6H6    (2)   2  (3)d   (4)b、c (以上每空2分)  (5) (4分,其他符合题意均可)

题目分析:

(1)分子式可以通过键线式数C、H数目或使用不饱和度进行计算。

(2)有两个对称轴,故一氯代物只有两种;

(3)X有环状结构和碳碳双键,故可以发生氧化、还原及加聚反应;

(4)从其结构上可以确定为环烃和不饱和烃;

(5)该物质的同分异构体可以从不饱和度的角度进行书写。

单项选择题

Questions from 31 to 35 are based on the following passage: China’s trade volume surged in 2010. The development wasn’t only in quantity, but also in quality — namely structure diversification.The European Union, the United States and Japan remained China’s top 3 largest trading partners in 2010.But trade volumes between China and other emerging economies increased also. Bilateral trade volumes between China and other BRIC nations — Brazil, Russia and India — all jumped more than 40 percent. That made India China’s tenth largest trading partner.Huang Guohua, Statistics Department Director of General Administration of Customs said “Trade volume between China and emerging economies increased faster than that with the traditional market. It indicates that China’s foreign trade is diversifying, and showing less dependence on the traditional partners. It’s a good way to reduce risks.”Data also shows that foreign trade volumes developed dramatically in China’s middle and western areas last year. Although the southern province of Guangdong still topped others in the total volume of import and export.Huang Guohua said “The export volume of middle and western areas surged over 40 percent year on year in 2010. The speed was 10 percentage points higher than the country’s total. It indicates that industrial structure has improved in these areas.”The import and export volume of private enterprises surged faster than the country’s average in 2010, with 47 percent year on year growth. Experts say China’s foreign trade development reduced dependence on foreign-funded enterprises.2010 imports and exports reached a historical high with a p sign that the country’s trade sector has shrugged off the global economic recession.

According to the passage, what does the word “BRIC ” mean ()

A.Brazil, Russia , India and China

B.Britain, Romania , Italy and Canada

C.Bulgaria, Russia , Indonesia and Colombia

D.Belgium, Romania , Israel and Cuba

问答题