问题 问答题

请根据下列装置图回答问题.

(1)写出图中仪器①、②的名称①______,②______;

(2)实验室用高锰酸钾制取氧气,选用的气体发生装置为______(填序号,下同),该反应的化学方程式为______;

(3)实验室用大理石和稀盐酸制取二氧化碳,选用的气体发生装置为______,气体收集装置为______.

答案

(1)出图中仪器①、②分别是试管和集气瓶;

(2)实验室用高锰酸钾制取氧气需要加热,属于固体加热型,故选发生装置A,方程式是:2KMnO4

  △  
.
 
K2MnO4+MnO2+O2↑;

(3)实验室用大理石和稀盐酸制取二氧化碳,不需加热,属于固液常温型,故选发生装置C,B装置中长颈漏斗下端管口未伸入液面以下,气体会从长颈漏斗逸出,所以不可用;二氧化碳的密度比空气大且能溶于水,故用向上排空气法收集;

故答案为:(1)试管;集气瓶;

(2)A; 2KMnO4

  △  
.
 
K2MnO4+MnO2+O2↑;

(3)C;E.

阅读理解

There are many kinds of cars in the world. My grandfather thinks this is because cars are like their drivers. He says, “Rich people have expensive cars, big people have large cars, and old people drive old cars.” But I don’t agree with him.

My neighbor, Mrs Hill, is 82 years old. She drives only on Tuesday to the bank. She never drives more than 30 kilometers an hour. Do you think Mrs Hill has a very old and small car? No! Her car is new. It’s very large, and it can go 200 kilometers an hour!

My friend Mike is an artist. He paints beautiful pictures with lots of colors. But his car is black. Mrs Bates has a very, very old car. It often has some trouble. Does she drive that kind of car because she is poor? No, she has four restaurants and two million dollars in the bank. My uncle Joe has a very small car. Every Sunday, he drives to the country with his wife, his three children, his mother and his dog.

Now, you have read about my friends and their cars. Do you agree with my grandfather? Maybe you have a car. Does it say something about you?

小题1: The writer’s grandfather thinks _______________.

A. a person has the same kind of car as himself (herself)

B. different people have cars of the same kind

C. poor people have large cars

小题2: Mrs Bates has an old car ________________.

A. because she is poor

B. because she likes old cars

C. and the passage doesn’t tell us why

小题3: Though Uncle Joe has a very small car, _____________.

A. he has a dog

B. he has a large family

C. he has no children

小题4: The writer’s friend Mike paints _________________.

A. pictures in black

B. colorful pictures

C. pictures with only a few colors

小题5: The writer thinks _______________.

A. cars are often the same as their drivers in many ways

B. artists shouldn’t drive black cars

C. a car doesn’t say anything about its owner

选择题