单选题：下列关于电解质电离的叙述中，不正确的是（）。A电解质的电离过程就是产生自由移动离子的过程B碳酸钙在水中难溶，但被溶解的碳酸钙全部电离，所以碳酸钙是强电解质C氯气

题目内容：

下列关于电解质电离的叙述中，不正确的是（）。

A电解质的电离过程就是产生自由移动离子的过程

B碳酸钙在水中难溶，但被溶解的碳酸钙全部电离，所以碳酸钙是强电解质

C氯气和氨气的水溶液导电性都很好，所以它们是强电解质

D水难电离，纯水几乎不导电，所以水是弱电解质

答案解析：

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