Question

what is the reason of stability of sols.​

Answer 1

Hii dear here is the answer

There are two main reasons for the stability of colloidal sols:

Solvation: Colloidal particles are covered by a sheath of liquid in which they are extensively solvated, thereby providing stability.

Electrostatic stabilisation: Presence of equal and similar charges on the colloidal particles prevents coagulation of the colloidal sol.