i) Alcohol- a colloidal solution having alcohol as the dispersion medium and a solid substance as the dispersed phase. Ex- colloidal sol of cellulose nitrate in ethyl alcohol.

ii) Aerosol- a colloidal solution having gas as the dispersion medium and a solid substance as the dispersed phase. Ex-Smoke.

iii) Hydrosol- a colloidal solution having Water as the dispersion medium and a solid substance as the dispersed phase. Ex-Gold sol.