问题 问答题

图中X是一种具有果香味的合成香料,D蒸气的密度是相同条件下氢气密度的14倍,E是生活中常见的一种有机物.回答下列问题

(1)A分子中官能团的名称______. 

(2)B→C的化学反应类型为______反应.

(3)A的一种同分异构体F不能发生消去反应,则F的结构简式为______.

(4)C+E→X的化学方程式为______.

答案

D蒸气的密度是相同条件下氢气密度的14倍,应为28,则D为CH2=CH2,E为CH3CH2OH,根据X的分子式可知C和E发生酯化反应,则C为CH3CH2COOH,B为CH3CH2CHO,A为CH3CH2CH2OH,

(1)A为CH3CH2CH2OH,含有的官能团为羟基,故答案为:羟基;

(2)B为CH3CH2CHO,在Cu催化作用下被氧化生成C,故答案为:氧化;

(3)A为CH3CH2CH2OH,对应的同分异构体由CH3CHOHCH3、CH3CH2OCH3,其中CH3CH2OCH3不能发生消去反应,故答案为:CH3CH2OCH3

(4)C和E发生酯化反应,反应的方程式为CH3CH2COOH+C2H5OH

浓硫酸
CH3CH2COOC2H5+H2O,故答案为:CH3CH2COOH+C2H5OH
浓硫酸
CH3CH2COOC2H5+H2O.

阅读理解

阅读理解。

     New rules and behaviors standards (行为规范) for middle school students came out in March. Middle

school is going to use a new way to decide who the top students are. The best students won't only have

high marks. They will also be kids who don't dye (染) their hair, smoke or drink. The following are some

of the new rules.

     To tell the truth, have you ever copied someone else's work on an exam? Don't do it again! That's not

something an honest student should do. If you have played com-puter games for two hours in your room,

don't tell your parents you have done homework.

      Do more at school. Good students love animals and care for other people. April is Bird-Loving Month

in China. Is your school doing anything to celebrate? You should join! In that way, you can learn more

about animals and how to protect them. When more people work to-gether, it makes it more fun for

everyone.

      Have you ever quarreled with your teammates when your basketball team lost? Only working together

can make your team stronger. Be friendly to the people you are with. Try to think of others, not only

yourself.

     Be open to new ideas. Have you ever thought that people could live on the moon? May-be you'll discover

Earth II someday. Don't look down on new ideas. Everyone's ideas are important. You should welcome

them, because new ideas make life better for everyone.

     Protect yourself. Has anyone ever taken money from one of your classmates? Don't let it happen to you.

If you have to go home late, you should let your parents know.

     Use the Internet carefully. The Internet can be very useful for your studies. But some things on the

Internet aren't for kids, so try to look at Web pages that are good for you. You can use the Web for fun

or homework. Can't you find any good Web sites for children? Here are some:

      http://www. eastday. com

      http://www. chinakids. net. com

      http://www. cycnet. Com

1. The school new rules will help kids by telling them _____. [ ]

A. how they can study well

B. what they should do at school

C. what is right and what is wrong

D. how they can protect themselves

2. According to the passage, which of the following is not true?[ ]

A. Take care of yourself when you are out.

B. Tell the truth, even when you are wrong.

C. Keep some animals to protect them.

D. Use the Internet, but keep away from bad things.

3. The main idea of the fourth paragraph is about _____. [ ]

A. making the team stronger

B. working together with others

C. being a good friend to others

D. getting on well with others

4. Good Web sites for children can _____. [ ]

A. be a waste of time

B. help them with their studies

C. do homework for them

D. make life easier

5. The passage tells us how to _____. [ ]

A. be top students

B. do more at school

C. care for others

D. use the Internet

选择题