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Answer -
(i) Alcosol:
A colloidal solution havingalcohol as the dispersion medium and a solid substance as the dispersed phaseis called an alcosol.
For example: colloidal sol ofcellulose nitrate in ethyl alcohol is an alcosol.
(ii) Aerosol:
A colloidal solution having a gasas the dispersion medium and a solid as the dispersed phase is called anaerosol.
For example: fog
(iii) Hydrosol
A colloidal solution having wateras the dispersion medium and a solid as the dispersed phase is called ahydrosol.
For example: starch sol or goldsol