Question

Why is vapourpressure of solution of glucose in water is lower than that of war?

Answer 1

The vapor pressure of solution is lower than that of the pure liquid. More correctly, the vapor pressure of solution containing a non-volatile (zero vapor pressure) solute is lower than that of the pure solvent. Because the solution is more stable, fewer molecules are leaving to the gas phase.

Answer 2

Answer:

The vapour pressure of an aqueous solution of glucose lower than that of water. It is because in glucose solution, the surface of liquid consists of both solute and solvent molecules, therefore, the fraction of surface covered by the solvent molecules gets reduced