Question

Name the factors on which the intensity of Brownian motion depends.

Answer 1

Step-1 Brownian motion:

1. An English Botanist, Robert Brown in 1827 found the best evidence for the existence and motion of particles in liquids.
2. He observed a continuous and rapid zig-zag motion in colloidal solution under the microscope. He called this continuous and rapid zig-zag motion of the colloidal particles as Brownian motion.

Step-2 Factors affecting the intensity of Brownian motion:

1. The intensity of Brownian motion depends upon the size of the particles and the viscosity of the dispersion medium.
2. The smaller the particles and the less viscous the dispersion medium, the more vigorous is the Brownian motion and vice versa.