Define the following terms giving an example of each:
(i) Associated colloids
(ii) Lyophilic sol
(i) Associated colloids:
1. They are formed by aggregation of a large number of ions in concentrated
solution Example: soap sol
2. Their molecular masses are generally high.
3. Higher is the concentration, greater are the Vander Waal's forces.
(ii) Lyophilic sol: Liquid loving colloids in which there is affinity between
disperse phase and dispersion medium.
Example: Starch sol, Gum sol, Gelatin sol
(iii) Adsorption: The process of attracting and retaining the molecule
of a substance on the surface of a liquid or a solid resulting into higher
concentration of the molecules on the surface is called adsorption.