Hint: Peptization may be defined as the process of converting a precipitate into a colloidal sol.

Peptization may be defined as the process of converting a precipitate into colloidal sol by shaking it with a dispersion medium in the presence of a small amount of electrolyte. The electrolyte used for this purpose is called a peptizing agent.

Dialysis: It is the process of removing a dissolved substance from a colloidal solution by means of diffusion through a suitable membrane.

The process of making emulsions is known as emulsification. The cleansing action of soap is due to emulsification and micelle formation.

The movement of colloidal particles under an applied electric potential is called electrophoresis and it is helpful in causing coagulation of colloidal solution.