(a) Identify the heterogeneous mixture from the following :
Air, soda water, soap solution, brass.
(b) Write two components of a colloidal solution. Give an example.

Explanation

(A) Soap solution is a heterogeneous mixture while the rest are of homogeneous nature.
(b) The two components of a colloidal solution are dispersed phase and dispersion medium. For example, a colloidal solution of starch in water (Starch acts as dispersed phase and water as the dispersion medium).