下列关于盐类水解反应说法正确的是 A．任何盐都可发生水解反_爱下问搜题

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问题选择题

下列关于盐类水解反应说法正确的是

A．任何盐都可发生水解反应

B．盐只能发生水解反应而不能发生其他反应

C．盐水解反应肯定能破坏水的电离平衡且促进水的电离

D．盐的水溶液为中性时，则盐一定不发生水解反应

答案

答案：C

正确答案：C

A．不正确，由弱酸或弱碱形成的盐才可发生水解反应

B．不正确，水解只是某些盐的性质；

C．正确；盐水解反应肯定能破坏水的电离平衡且促进水的电离

D．不正确，盐的水溶液为中性时，有两种可能，一是强酸强碱盐不发生水解反应，二是弱酸弱碱盐，水解能力差不多。

阅读理解

Read and answer.（阅读短文，并回答问题）。

I'm Mingming. I have two good friends. They are Dongdong and Tiantian.

Dongdong likes English very much. He works hard. He reads English every morning. He likes speaking

English. He often listens to the radio. He likes watching TV. But he watches it only on Saturday evenings.

Tiantian likes singing. She sings very well. She likes flying, too. She is a beautiful bird. Both Dongdong and

I like her. We always play with her. But my parents think she is too noisy ( 大吵大闹的 ).

1. Does Dongdong watch TV every evening ?

2. Is Tiantian a girl ?

3. What does Tiantian like doing ?

4. Are Dongdong and Tiantian good friends ?

5. Does Mingming's mother like Tiantian ?

多项选择题

常用流量仪表有（）。

A.转子流量计；

B.流速式流量计；

C.差压式流量计；

D.靶式流量计。