Question

Explain Tyndall effect and Brownian movement with a suitable diagram. (Textbook question- VII(2))

Answer 1

1. Tyndall effect

when a strong beam of light is focused on a colloidal solution the path of the beam becomes visible. This phenomenon is known as Tyndall effect

2. Brownian movemen

When colloidal solution are viewed under powerful microscope, it can be seen that colloidal particles are moving constantly and rapidly in zig-zag directions. The Brownian movement of colloidal particles is due to the unbalanced bombardment of the particles by the molecules of dispersion medium.