Question

What is brownian motion & how does it arise ?

Answer 1

Answer:

Brownian motion is the random motion of particles suspended in a fluid resulting from their collision with the fast-moving molecules in the fluid.

It is caused by collisions between small colloidal particles and the molecules of the dispersion medium.

Hope this helps!

Answer 2

Brownian motion is a random movement of the  dispersed phase particles in a colloid . it arises due to the repulsion between the particles of the dispersed  phase because there is a charge adsorbed by every dispersed phase particle which leads to the repulsion

Explanation;

this phenomenon is responsible for the stability of the colloid