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Question

The molecular weight of heavy water is _________ than ordinary water.

A
lower
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B
higher
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C
same
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D
none of the above
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Solution

The correct option is B higher
The molecular weight of heavy water is higher than ordinary water.
In a molecule of heavy water, the hydrogen atoms are isotopes in which the nuclei of each contain a proton and a neutron, and hence are twice as heavy as normal hydrogen atom.

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