MEDIUMMCQ SINGLEIChO (Chemistry Olympiad)Physical ChemistrySolutionsDepression in freezing point

What happens to freezing point of benzene when naphthalene is added?

A.Increases

B.Decreases✓ Correct

C.Remains unchanged

D.First decreases and then increases

Explanation

Freezing point of benzene decreases when naphthalene is added. It is because of the fact that adding a non-volatile substance to a volatile substance lowers the freezing temperature in this case naphthalene is a volatile solute.

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