. The Brownian motion is due to
a. temperature fluctuation within the liquid phase
b. attraction and repulsion between charges on the colloidal particles
c. impact of the molecules of the dispersion medium on the colloidal particles
d. convectional currents
Answer ||| (c)
Solution ||| Brownian motion is the random movement of the low weight particles suspended in a fluid. It arises because of the unequal impacts of the particles of the dispersion medium on the colloidal particles.