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Question

why does the electrolysis of ordinary water leaves behind water richer in heavy water ?

a- as D2O is heavy

b- as D2O decomposes fast

c- AS D2O is reactive

d- all

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Solution

Electrolysis of ordinary water leaves behind water richer in heavy water as D2O is heavy. At each stage lighter H2 and O2 are evolved while D2O is left behind.

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