Solution:
Those properties of ideal solutions which depend only on the number of particles of the solute (molecules or ions) dissolved in a definite amount of the solvent and do not depend on the nature of solute are called colligative properties. Tho important colligative properties are
(i) Relative lowering of vapour pressure.
(ii) Osmotic pressure
(iii) Elevation in boiling point
(iv) Depression in freezing point
