The vapour pressure of a solution is always less than of the pure solvent, when the temperature of both the solution and solvent are thesame, with thesame external pressure acting over them. Explain.

The vapour pressure of a solution is always less than of the pure solv

1.	The vapour pressure of a solution is always less than of the pure solvent, when the temperature of both the solution and solvent are thesame, with thesame external pressure acting over them. Explain.
Answer» Solution :(i) RELATION between thevapour PRESSURE of the liquid andits intermolecular forces of attraction (ii) comparison of theconstituents of solution andpure solvent (iii) comparison of the intermolecular force of attraction existing in the solution andthat in the existing pure solvent (IV) EFFECT on vapour pressure