下列叙述中,正确的是A.含金属元素的离子不一定都是阳离子B.在氧化

下列叙述中,正确的是

A.含金属元素的离子不一定都是阳离子

B.在氧化还原反应中,非金属单质一定是氧化剂

C.某元素从化合态变成游离态时,该元素一定被还原

D.能与酸反应的氧化物,一定是碱性氧化物

 

答案

A

解析:

 

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