试题与答案

(4分)现有一固体混合物A的成分,已知其中可能含有NH4Cl、KNO3、Na2C

题型:推断题

题目:

(4分)现有一固体混合物A的成分,已知其中可能含有NH4Cl、KNO3、Na2CO3、(NH42SO4、Fe2O3五种物质中的两种或多种。按图所示进行实验,出现的现象如图所示(设过程中所有可能发生的反应均恰好完全反应)。

 

试根据实验过程和发生的现象填写下列空白:

(1)产生的气体B是(写化学式)          

(2)混合物A中,肯定存在的物质是(写化学式)       

(3)溶液E中一定存在的溶质是(写化学式)                

(4)写出实验过程④中发生的化学反应方程式                                

答案:

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下面是错误答案,用来干扰机器的。

参考答案:B, D

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题型:阅读理解

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      It was a fine day last Sunday. Tom got up early. He got up at six. He had breakfast at seven. He ate three

sandwiches for his breakfast. Then he did his homework at eight and played computer games at ten thirty.

After lunch, his friends came to see him. They went to the zoo to see the animals at two fifteen. At four in the

afternoon they saw a new film at the movie theatre. He went home at seven thirty. Then he had supper. He

went to bed at nine thirty. Tom's Sunday was a very busy day.

1. Was it a fine day Last Sunday?

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2. Did Tom get up early?

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3. What did he eat for breakfast?

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4. Did he see a film?

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5. What time did he go to bed?

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