AP BIOLOGY

Detailed explanation-1: -Dispersion is a process by which (in the case of solid dispersing in a liquid) agglomerated particles are separated from each other, and a new interface between the inner surface of the liquid dispersion medium and the surface of the dispersed particles is generated.

Detailed explanation-2: -Emulsion is a dispersion of one liquid in another liquid.

Detailed explanation-3: -Fog is an example of colloidal system with liquid dispersed in gas.

Detailed explanation-4: -Gas dispersed in solid means Gas is the dispersed phase and solid is the dispersed medium. So, among the given compounds an example of gas dispersed in solid is Pumice stone.

Detailed explanation-5: -Therefore, the colloidal dispersion of a liquid in gas is called aerosol.