Answer:
Depending upon whether the dispersed phase and the dispersion medium are solids, liquid or gases, eight types of colloidal systems are possible. A gas mixed with another gas never forms a colloidal system.
Out of the various types of colloids given above, the most common are sots (solids in liquid), gel (liquid in solids) and emulsions (liquids in liquids).
(i) If the dispersion medium is water, the sol is called aquasol or hydrosol.
(ii) If the dispersion medium is alcohol, it alcohol, it is called alcosol.
Dispresed phase
Dispersion medium
Type of colloid
Examples
Solid
Solid
Solid sol
Some coloured glasses and gem stones.
Solid
Liquid
Sol
Paints cell fluids
Solid
Gas
Aerosol
Smoke, dust
Liquid
Solid
Gel
Cheese, butter, jellies
Liquid
Liquid
Emulsion
Milk, hair cream
Liquid
Gas
Aerosol`
Fog, mist, cloud, insecticide- sprays
Gas
Solid
Solid sol
Pumice stone, foam rubber
Gas
Liquid
Foam
Forth, whipped cream, soap-lather
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