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氯及其化合物

> 下列说法正确的是(　　) A．向久置的氯水中滴入紫色石蕊试液，溶液先变红后褪色 B．欲除去Cl2中的少量HCl气体，可将此混合气体通入盛有饱和食盐水的洗气瓶 C．漂白粉的有效成分是CaCl2和Ca(ClO)2，应密封保存 D．实验室用MnO2和稀HCl加热法制取Cl2，若有14.6 gHCl参加反应，则可制得7.1 g Cl2

问题：

发布时间：2024-09-08

下列说法正确的是(　　)

A．向久置的氯水中滴入紫色石蕊试液，溶液先变红后褪色

B．欲除去Cl₂中的少量HCl气体，可将此混合气体通入盛有饱和食盐水的洗气瓶

C．漂白粉的有效成分是CaCl₂和Ca(ClO)₂，应密封保存

D．实验室用MnO₂和稀HCl加热法制取Cl₂，若有14.6 gHCl参加反应，则可制得7.1 g Cl₂

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