The vapour pressure of a solution of non-volatile solute is — Solutions and Colligative Properties Chemistry Question

💡 Solution & Explanation

When a non-volatile solute is dissolved in a solvent, some solute particles occupy positions on the liquid surface. This reduces the surface area available for solvent molecules to escape into the gas phase, lowering the rate of evaporation and resulting in a vapour pressure that is always less than that of the pure solvent.