下列实验操作及现象合理的是(    ) A.用广泛pH试纸测得某溶液

下列实验操作及现象合理的是   

A.用广泛pH试纸测得某溶液的pH=1.4  

B.铁丝在O2中燃烧,发白光,生成白色固体

C.用托盘天平称取5.6g硝酸钾固体  

D.灼烧羊毛,会闻到和烧纸一样的气味

答案

C

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