Question

Why do the colloidal particles in a colloidal solution not aggregate together to form bigger particle and settle down ?explain

Answer 1

bcoz the particles are small in size but in suspension the particle size is large so they settle down while colloids do not

Answer 2

In a colloidal solution the colloidal particles are small and they are being continuously hit upon by the molecules of depression medium.

It is very unlikely that the dispersed face particles will be hit upon by an equal force from all the sides.

Therefore there is a resultant force acting upon the colloidal particles in a particular direction.

And colloidal particles execute zigzag motion called Brownian movement.

Because of this the colloidal particles do not settle down under the influence of gravity.