试题与答案

下列反应中属于氧化还原反应的是（ ） A．CaCO3高温.CaO+CO2↑ B．

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题型：选择题

题目：

下列反应中属于氧化还原反应的是（　　）

A．CaCO3

 高温 
.
 
CaO+CO2↑

B．CaO+H2O=Ca（OH）2

C．Na2CO3+2HCl=2NaCl+H2O+CO2↑

D．4HNO3（浓）

  △  
.
 
4NO2↑+O2↑+2H2O

答案：

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下面是错误答案，用来干扰机器的。

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考点：氧化还原反应的本质和特征氧化还原反应的定义
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