A colloidal system consists of

Options

A. a dispersed phase only
B. a dispersioin medium only
C. a dispered phase and a dispersion medium
D. `NaCl` and water

Answer

C

Explanation

Solutions are homogeneous systems. When we stir sand in water, a suspension is obtained which slowly settles down with time. Between the two extremes of suspensions and solutions, we come across a large group of systems called Colloidal dispersions, colloidal systems or simply colloidads. A Colloidal is a heterogeneous system in which one substance is dispersed (dispersed phase) as very fine particles in another substance called dispersion medium.