问题 填空题

实验室制取气体常常用到下列装置,根据给出的装置回答下列问题:

(1)写出标号仪器的名称:①              

(2)若该实验选择装置A来制取氧气,请写出该反应的化学方程式                  。用C装置收集氧气,判断氧气已收集满的现象是                              

(3)某同学从上述装置图中选用适当装置成功的制备和收集了二氧化碳,选用的装置是            

(填字母).为了进一步验证产生的气体是二氧化碳,该同学将气体通入图F装置中,则F装置中应加入的试剂为              (填化学式).

(4)若要制取氢气,用F装置收集,气体应从         (填“a”或“b”)导管口通入。

答案

(1)锥形瓶;(2)2H2O2 2H2O+O2↑;气泡从瓶口向外冒出;(3)AD;Ca(OH)2;(4)b

题目分析:(1)写出标号仪器的名称:①锥形瓶;(2)若该实验选择装置A来制取氧气,因为是常温下反应制取氧气,该反应的化学方程式:2H2O22H2O+O2↑;用C装置收集氧气,判断氧气已收集满的现象是气泡从瓶口向外冒出;(3)某同学从上述装置图中选用适当装置成功的制备和收集了二氧化碳,实验室制取二氧化碳是固液常温下反应生成的气体能溶于水且密度比空气大,故选用的装置是AD;为了进一步验证产生的气体是二氧化碳,该同学将气体通入图F装置中,则F装置中应加入的试剂为Ca(OH)2;(4)若要制取氢气,用F装置收集,因为氢气的密度比空气的大,故应该短进长出,气体应从b导管进入。

阅读理解

阅读理解。

                                                                      Mr Perfect

     With a healthy image, handsome face and Japan's coolest haircut, Takeshi Kaneshiro (金城武) is one of

Asia's most attractive stars.

     When "Turn Left Turn Right" (<<向左走向右走>>) opens in Chinese cinemas next month, there's no

doubt the 29-year-old boy will get even more attention.

     Takeshi stars as John, a lonely violin player who falls in love with a translator called Eve, played by Gigi

Leung(梁咏琪). Many of Takeshi's fans like to copy his haircut, clothes and even his smile. But they will find

it hard to copy the way he plays the violin in the movie. He impressed his director To Keifung (杜琪峰) by

learning to play the violin in a few weeks.

     This attitude to hard work is one of the reasons why Takeshi is such a good role model for young people.

Like many young people, he values friendship more than anything else. "My best friends are my former

schoolmates," he once said,"We became close when we were at school and will be friends forever."

      Besides his good looks and hairstyle, he is well known for his healthy image. He started his acting career at

the young age of 15 but, unlike other pop stars, he has rarely behaved badly. He stays away from drugs,

alcohol and cigarettes. Violence, rude words and dirty jokes seldom appear in his movies.

     "I hated foreign language classes when I was in school, but now I find speaking several languages helps me

a lot in my career," he said. For someone who only took up acting, Takeshi has come far. No doubt his star

will rise even higher.

1. The title "Mr. perfect" suggests that _____.

A. Takeshi always plays a perfect role in the film

B. Takeshi impressed his audience and fans with a perfect image

C. Takeshi acts perfectly in all the films

D. Takeshi can speak Chinese perfectly

2. According to the passage, which of the following is right? 

A. Takeshi has become even more attractive because of the film "Turn Left Turn Right".

B. Takeshi falls in love with Gigi Leung

C. Fans like to copy his life style including the way he smokes.

D. Takeshi will be more successful in the future.

3. Why is Takeshi thought to be "healthy"?

A. He works hard.

B. He is seldom ill.

C. He behaves in a healthy way.

D. Both A and C

4. The reason why Takeshi took up acting is that ______.   

A. he wanted to buy a motorbike   

B. he loves movies more than anything else   

C. he was attracted by some movie stars when he was 15   

D. none of the above

单项选择题