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Question

Heavy water (D2O) is


A

a product of oxygen and hydrogen

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B

water of mineral springs

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C

water obtained by repeated distillation and condensation

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D

ordinary water containing dissolved salts of heavy metals

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Solution

The correct option is C

water obtained by repeated distillation and condensation


Heavy water is the molecule of water which has the second isotope of hydrogen i.e., "deuterium" rather than an H atom. Hence heavy water has a slightly higher boiling point than H2O.
The difference in mass can be utilised to separate heavy water from regular water by repeated distillation.

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