问题 填空题

(6分)工业上用电解饱和食盐水的方法生产氯气和烧碱。

(1)食盐溶于水发生电离,其电离方程式为____________________________________。

(2)2004年4月15日,某化工厂发生氯气泄漏事件,工作人员喷射溶液形成液幕,包围并吸收泄漏的氯气,其反应原理为__________________(用离子方程式表示)。

(3)事件过后,附近居民向记者反映当时晾在外面的衣服褪色了,其原因是_________

___________________________(结合化学方程式解释)。

答案

(1)

(2)

(3)具有强氧化性,可漂白

(1)食盐溶于水发生电离,其电离方程式为:

(2)氯气与氢氧化钠反应的方程式为:

(3)晾在外面的衣服褪色了,其原因是具有强氧化性,可漂白;

阅读理解

阅读理解。

     Once there was a king. He never ate a meal without fish. But one day there was a big storm (风暴) and

the fishermen were not able to go out to catch fish, so the king had no breakfast and no lunch. Then he

ordered his servants (仆人) to tell everyone in his country that if anyone brought him a fish, he would give

him anything he asked for.

     At last, a fisherman caught a big fish and hurried to the king's palace with it. But the king's prime minister

(宰相) stopped him and said, if the fisherman did not promise (答应) to give him half of whatever the king

gave him for the fish. He would not let the fisherman in.

     The king was very happy when he saw the fish. He said to the fisherman,"Now, what do you want for

your fish?"

      "I want you to beat (打) me twenty-four times" said the fisherman.

      The king was very surprised, and at last he said, "I promised to give you whatever you wanted, and I

think that I must keep my promise." So he began to beat the fisherman softly.

      "No," said the fisherman, "beat me as hard as you can!"

      After the king had beaten him twelve times, the fisherman jumped away and said, "That's enough for me.

I promised the other twelve to your prime minister."

      Again the king was very surprised, but the prime minister had to admit (承认) that the fisherman was

right. The king not only gave him the twelve beatings, but also said, "You will not be my prime minister."

1. The king           . [ ]

A. never ate fish

B. liked to eat fish very much

C. never ate fish without a meal

D. never ate a meal

2. The king's prime minister stopped the fisherman because           . [ ]

A. he didn't want the king to eat fish

B. the fisherman had a fish in hand

C. he wanted to get half of the fisherman's reward (报酬)

D. the fisherman walked fast

3. Why did the fisherman want the king to beat him? Because           . [ ]

A. he knew he was wrong

B. the king had no meal for days

C. he wanted the prime minister to be beaten, too

D. he was afraid of the prime minister

4. In fact the fisherman was beaten           . [ ]

A. twenty-four times

B. twelve times

C. forty-eight times

D. softly

5. At first, why did the king beat the fisherman softly? [ ]

A. Because the king was too weak.

B. Because he didn't want to beat the man.

C. Because the fisherman was old.

D. Because he knew he would beat the prime minister, too.

单项选择题