问题 选择题

下列实验现象预测正确的是

[ ]

A.实验Ⅰ:振荡后静置,溶液不再分层,且保持无色透明

B.实验Ⅱ:铁片最终完全溶解,且高锰酸钾溶液变无色

C.实验Ⅲ:微热稀HNO3片刻,溶液中有气泡产生,广口瓶内始终保持无色

D.实验Ⅳ:当溶液至红褐色,停止加热,让光束通过体系时可产生丁达尔现象

答案

答案:D

阅读理解

阅读理解。

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名词解释