With the helps of a suitable diagram, whow that the lowering of vapour pressure of a solution than the pure solvent causes a lowering of freezing point for the solution compared to that of the pure solvent.

The freezing point of solution is ……..than the boiling point of pure solvent.

Vapour pressure of a solvent containing nonvolatile solute is:

In the depression of freezing point experimet, it is found that: I. The vapour pressure of the solution is less than that of pure solvent. II. The vapour pressure of the solution is more than that of pure solvent. III. Only solute molecules solidify at the freezing point. IV. Only solvent molecules solidify at the freezing point.

In the depression of freezing point experiment , it is found that : (P) the vapour pressure of the solution is less than that of pure solvent . (Q) the vapour pressure of the solution is more than that of pure solvent . (R) only solute molecules solidify at the freezing point . (S) only solvent molecules solidify at the freezing point .

The lowering of vapour pressure of the solvent takes place on dissolving a non-volatile solute because

The boiling point of solution is ……..than the boiling point of pure solvent.