Question

The values of colligative properties of colloidal solution are of small order in comparison to those shown by true solutions of same concentration because of colloidal particles :

• A. exhibit enormous surface area
• B. remain suspended in the dispersion medium
• C. form lyophilic colloids
• D. are comparatively less in number

Answer 1

The correct option is D are comparatively less in number

• Colloidal particles being bigger aggregates, the number of particles in a colloidal solution is comparatively small as compared to a true solution.
• Hence, the values of colligative properties (osmotic pressure, lowering in vapour pressure, depression in freezing point and elevation in boiling point) are of small order as compared to values shown by true solutions at same concentrations.