Provide information about the colligative properties and the color of colloidal solutions.

(N/A) Colligative Properties: Colloidal particles are larger aggregates,so the number of particles in a colloidal solution is comparatively small 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 a smaller order compared to the values shown by true solutions at the same concentration.
Color: The color of a colloidal solution depends on the wavelength of light scattered by the dispersed particles. The wavelength of light further depends on the size and nature of the particles. For example,the finest gold sol appears red,while larger particles appear purple or blue.