问题 选择题

温度体积固定的容器中建立2NO2 N2O4平衡,平衡时NO2与N2O4物质的量浓度之比为Φ,条件不变的情况下,分别再充入NO2和再充入N2O4,平衡后会引起Φ的变化正确的是:(   )

A.都引起Φ增大

B.充入NO2引起Φ增大,充入N2O4引起Φ减小

C.都引起Φ减小

D.充入NO2引起Φ减小,充入N2O4引起Φ增大

答案

答案:C

该反应中,充入气体,压强不变,均为等效平衡Φ不变,在体积固体的容器中,充入气体,相当于压强增大,平衡正向移动,Φ减小。

阅读理解

阅读理解。

     A young man was walking through the street one day and he was very thirsty.

     Finally he went into a shop and asked the shopkeeper,"How much are these cakes you have here?"

     "Five cents each," was the answer.

     "I'll give you ten cents for three of them."

     "All right," said the shopkeeper.

     So the young man took three cakes and then began looking at some other things in the shop."How much

is this wine?" he asked.

     "Ten cents a glass."

     "Well, I'm more thirsty than hungry. Please take back the cakes and give me a glass of wine."

      So the shopkeeper gave him a glass of wine. The young man drank the wine and began to walk out of

the shop.

     "Just a minute, young man," said the shopkeeper."You didn't pay for the wine."

     "Of course not, I gave you the cakes for it."

     "But you didn't pay for the cakes."

     "I didn't eat them. I gave them back to you. I certainly don't have to pay for anything I didn't eat, do I?"

And before the shopkeeper could think of an answer to that, the young man was out of the shop.

1. The young man went into a shop because ______.

A. he was thirsty

B. he was hungry

C. he was tired

D. he wanted to ask the way

2. What's the meaning of the phras e"Just a minute" in Chinese?

A. 一分钟

B. 仅仅一分钟

C. 正好一分钟

D. 等一下

3. Which of the following did the young man get at last?

A. Two cakes.

B. Three cakes.

C. A glass of wine.

D. A cake and a glass of wine.

4. How much did the young man pay at last?

A. Five cents.

B. Ten cents.

C. Fifteen cents.

D. Nothing.

5. Which of the following is TRUE?

A. The young man walked through the street to a shop.

B. The young man wanted to pay ten cents for three cakes.

C. The young man didn't want a glass of wine.

D. The shopkeeper was very clever.

问答题 简答题