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Question

Heavy water is obtained by

A
Boiling water
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B
Fractional distillation of water
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C
Prolonged electrolysis of water
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D
Heating H2O2
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Solution

The correct option is C Prolonged electrolysis of water
Ordinary water, H2O contains a small proportion of heavy water, D2O (about 1 part in 5000).The main source of heavy water is the ordinary water from which it is isolated. Generally, it is prepared by exhaustive electrolysis.

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