问题 问答题

有机物A可以通过不同化学反应分别制得B、C和D三种物质,构简式如图所示.

(1)B中的含氧官能团名称是______.

(2)A→C的反应类型是______;A~D中互为同分异构体的是______.

(3)由A生成B的化学方程式是______.

(4)C在一定条件下发生加聚反应的化学方程式是______.

答案

(1)B中的含氧官能团为醛基、羧基,故答案为:醛基、羧基;

(2)A→C的变化为-OH在浓硫酸作用下发生消去反应生成C=C,C和D分子式相同,但结构不同,属于同分异构体,

故答案为:消去反应;C和D.

(3)A中含有-OH,在催化剂条件下可被氧化生成-CHO,反应的方程式为

故答案为:

(4)C中含有C=C,可发生加聚反应,反应的方程式为

故答案为:

填空题

阅读下面短文,根据所读内容在表格中的空白处填入恰当的单词。 注意:每个空格只填一个单词。

     Many people need guidance in choosing a career(职业). Fortunately, there is much information on the Web

about job opportunities(机会).With all the information available, it's not surprising that people can feel

confused. So if you're ready to start your first job or change careers, where do you begin?

      The Occupation Handbook is a good resource. Regularly updated, the Handbook is available as a book and

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     The Occupation Handbook is just an example of websites that can help you plan a new career. When you

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your future career is an extremely important decision. It's worth taking the time and finding as much

information as you can.

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