Explain the terms with suitable examples:
$(i)$ Alcosol
$(ii)$ Aerosol
$(iii)$ Hydrosol.

(N/A) $(i)$ Alcosol:
$A$ colloidal solution having alcohol as the dispersion medium and a solid substance as the dispersed phase is called an alcosol.
For example: colloidal sol of cellulose nitrate in ethyl alcohol is an alcosol.
$(ii)$ Aerosol:
$A$ colloidal solution having a gas as the dispersion medium and a solid or liquid as the dispersed phase is called an aerosol.
For example: smoke (solid in gas) or fog (liquid in gas).
$(iii)$ Hydrosol:
$A$ colloidal solution having water as the dispersion medium and a solid as the dispersed phase is called a hydrosol.
For example: starch sol or gold sol.