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Question

Unlike any other compound in our known universe, _________ molecule expands in volume instead of compacting after reaching freezing point.


A

Water

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B

Hydrogen

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C

Alcohol

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D

Mercury

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Solution

The correct option is A

Water


For any given volume of liquid water at room temperature, there will an increase in volume by about 9.05% once it has been freezed. The molecule expands by approximately 9% and this unusual behavior is due to the structure of the water molecule.


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