题干

下表中,除去物质所含杂质的方法错误的是(   )

选项

物质

所含杂质

除去杂质的方法

A

H2

HCl气体

通过NaCH溶液,再通过浓硫酸

B

NaCl溶液

Na2CO3

加入适量稀盐酸

C

CO

CO2

通过灼热的Fe2O3

D

CaCO3粉末

KCl

加水溶解、边滤、蒸干

A:A

B:B

C:C

D:D

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C

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