问题 问答题

由题中所给的信息Ⅰ、Ⅱ,结合已学知识,回答下列问题:

Ⅰ:

是环戊烯的结构简式,可进一步简写为

环戊烯的化学性质跟烯烃相似.

Ⅱ:有机物中烯键可发生如下反应:

①(CH32C=CHCH3   

(1)O3
(2)Zn,H2O
(CH32C=O+CH3CH=O

(1)O3
(2)Zn,H2O

(1)写出异戊二烯(

)经O3分解生成的各种产物的结构简式及物质的量之比:______.

(2)写出由环己醇

合成己二醛 (

)各步反应的化学方程式:______.

(3)某烃A的分子式为C10H16.A经O3分解可得到等物质的量的两种产物,其结构简式分别为HCHO和

.A经催化加氢得产物B,B的分子式是C10H20,且B内含有六元碳环.写出A和B的结构简式.A:______B:______.

答案

(1)由题意可知,断裂位置为C=C,可生成HCHO、CH3COCHO,n(HCHO):n(CH3COCHO)=2:1,

故答案为:n(HCHO):n(CH3COCHO)=2:1;

(2)

先发生消去反应生成环己烯,环己烯氧化可生成

,反应的流程为

故答案为:

(3)A经催化加氢得产物B,B的分子式是C10H20,且B内含有六元碳环,说明A中含有2个C=C,则A为

,B为

故答案为:

单项选择题

More and more residences, businesses, and even government agencies are using telephone answering machines to take messages or give information or instructions. Sometimes these machines give (1) instructions, or play messages that are difficult to understand. If you (2) telephone calls, you need to be ready to respond when you get a (3)

The most common machine is the (4) used in residence. If you call a home (5) there is a telephone answering machine (6) you will hear several rings and then a recorded message that (7) says something like this: "Hello. We can’t come to the (8) right now. If you want us to call you back, please leave your name and number after the beep." Then you will hear a "beep", (9) is a brief, high-pitched (10) . After the beep, you can say who you are, whom you want to speak to, and what number the person should call to (11) you, or you can leave a (12) . Some telephone answering machines record for only 20 or 30 seconds after the beep, (13) you must respond quickly.

Some large businesses and government agencies are using telephone answering machines to provide information on (14) about which they receive a large volume of (15) . Generally speaking, using these systems (16) you to have a touch-tone phone ( a phone with buttons rather than a rotary dial). The voice on the machine will tell you to (17) a certain button on your telephone if you want information on Topic A, another button for Topic B, and so on. You listen (18) you hear the topic you want to learn about, and then you push the (19) button. Immediately after making your (20) , you will hear a recorded message on the topic.

2()

A.commands

B.requires

C.asks

D.requests

单项选择题 A1/A2型题