题干

工业上电解海水(含氯化钠)可以得到多种化工产品,同时能处理含二氧化硫的废气,该流程如下图所示。下列说法正确的是()

A:该流程中有两种单质

B:图中反应①属于分解反应

C:反应中硫元素的化合价发生变化

D:从海水中最终得到“NaCl(产品)”的过程是物理变化

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答案(点此获取答案解析)

A

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