问题 问答题

A物质在常温下是液体,在一定条件下可以分解成气体B和液体C,将D单质放在B中燃烧,会发出白光,同时产生可以使澄清石灰水变浑浊的气体E,将铁丝放在B中燃烧,火星四射,生成黑色固体F.

(1)是判断A、B、C、D、E、F各是什么物质,写出它们的化学式

A:______  B:______   C:______  D:______  E:______  F:______

(2)写出相关的文字表达式:A生成B和C______铁丝与B生成F______.

答案

由于E是能使澄清石灰水变浑浊的气体,所以E是二氧化碳,将铁丝放在B中燃烧,火星四射,生成黑色固体F,则可知B是氧气,F是四氧化三铁,将D单质放在B中燃烧,会发出白光,则知D是碳,A物质在常温下是液体,在一定条件下可以分解成气体B和液体C,所以可知A是双氧水,C是水;

(1)由分析知A、B、C、D、E、F的化学式分别是H2O2、O2、H2O、C、CO2、Fe3O4

(2)A生成B和C的反应是双氧水分解生成水和氧气的反应,其表达式为双氧水

二氧化锰
水+氧气,铁丝与B生成F是铁丝的燃烧过程,其反应的表达式为铁+氧气
点燃
四氧化三铁;

故答案为:(1)H2O2;O2;H2O;C;CO2;Fe3O4;(2)双氧水

二氧化锰
水+氧气;铁+氧气
点燃
四氧化三铁;

阅读理解

Frank Smithson woke up and got up to turn off the alarm clock(闹钟). “Oh no!” he thought to himself. “Another day at that office; a boss (老板) who shouts at me all the time.”

As Frank went downstairs, his eyes fell on a large brown envelope (信封) by the door. He was very happy when he opened it and read the letter inside. “Bigwoods Football Pools (足球赌博公司) would like to congratulate you. You have won half a million pounds(英镑).”

Frank suddenly came to life. The cigarette fell from his lips (唇) as he let out a shout that could be heard halfway down the street.

At 11:30 Frank arrived at work. “Please explain why you're so late,” his boss said. “Go and jump in the lake,” said Frank. “I've just come into a little money so this is good-bye. Find yourself someone else to shout at.”

That evening Frank was smoking a very expensive Havana cigar (雪茄) when a knock was heard on the door. He rushed to the door. Outside were two men, neatly dressed in grey suits. “Mr. Smithson,” one of them said, “we're from Bigwoods Pools. I'm afraid there's been a terrible mistake…”

小题1:What do we know about Frank from the passage?

A.He was a lazy man.  

B.He was a lucky person.

C.He had made a lot of money.

D.He got on well with his boss.小题2:When he heard the knock at the door, Frank probably thought _________.

A.someone had come to say sorry to him

B.someone had come to give him the money

C.his friends had come to ask about the football pools

D.his friends had come to congratulate him on his luck小题3:On hearing “…there's been a terrible mistake…”, Frank was most likely to be_____.

A.disappointed (失望的)

B.worried

C.grateful

D.curious

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