Question

Which among the following is a colloidal system with solid as the dispersed phase and gas as the dispersion medium?

• A. fog
• B. cloud
• C. air
• D. smoke

Answer 1

The correct option is D smoke

A colloid is a heterogeneous mixture in which the particles of the dispersed phase are distributed non-uniformly in the dispersion medium.

In smoke, solid particles (dispersed phase) like ash, dust, etc. are dispersed in air (dispersion medium). Hence, it is a colloid with solid as the dispersed phase and gas as the dispersion medium.