MEDIUMMCQ SINGLEIChO (Chemistry Olympiad)Physical ChemistrySolutionsDepression in freezing point

Sprinkling of salt helps in clearing the snow covered roads in hills. The phenomenon involved in the process is

A.lowering in vapour pressure of snow

B.depression in freezing point of snow✓ Correct

C.increase in freezing point of snow

D.melting of ice due to increase in temperature by

Explanation

When salt is sprinkled on snow (ice) the resulting solution has a freezing point of - 0 20 C (approx.).The salt when added to the ice causes the depression in freezing point and lowers the freezing point of mixture.

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