下列说法正角的是 A、分解双氧水的催化剂只有二氧化锰B、双氧水只

下列说法正角的是

A、分解双氧水的催化剂只有二氧化锰B、双氧水只有加入了二氧化锰才会分解

 C、高锰酸钾受热分解后的剩余固体中的二氧化锰是催化剂

 D、向上排空气法收集氧气时,用带火星的木条放在集气瓶口来检验集气瓶中是否收集满氧气

答案

D

 

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