Q.

Find the wrong statement among the following

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a

When ice is converted into water its internal energy increases by more than 80 cal/gm.

b

When water is converted into steam its internal energy increase by less than 540 cal/gm.

c

If pressure increases, melting point of ice decreases.

d

If pressure increases, boiling point of water decreases.

answer is D.

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Detailed Solution

The substances which expand during  phase change, an increase of pressure increases the melting or boiling point and vice-versa.
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