NEET levelSingle correct optionDifficulty 1 of 3sc120
Brownian motion of colloidal particles is caused by
Aunbalanced bombardment of the particles by molecules of the dispersion medium
Bthe electric charge on the particles
Cthe gravitational pull of the earth
Dthe convection currents produced by the lamp
Answer: A
Molecules of the dispersion medium are in constant random motion and strike the colloidal particles from all sides. The impacts are unequal at any instant, so the particles show a zig-zag motion.