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what are the different type of colloid according to disappear phase and disappearing medium​

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How are colloids classified on the basis of:

(i) physical states of components,

(ii) nature of dispersed phase and

(iii) interaction between dispersed phase and dispersion medium

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The classification of colloids on the basis of (i) physical states of components:

On the basis of physical states of the dispersed phase and dispersion medium, the colloidal solutions classified into eight types of colloidal systems as shown in the following table.

Note: A mixture of gas with another gas is a homogeneous mixture and not a colloidal solution.

Dispersed phase

Dispersion medium

Type of colloidal solution

Example

Solid Solid

Solid sol

Alloys

Solid

Liquid Sol Paints

Solid Gas Aerosol Smoke

Liquid Solid Gel Jelly

Liquid

Liquid Emulsion Milk

Liquid Gas Aerosol Mist

Gas Solid Solid sol

Pumice

Gas

Liquid Foam Soap

(ii) Nature of dispersed phase and dispersion medium:

Colloids are classified into following.

(i) Alcosol

It is a colloidal solution of a solid (dispersed phase) in alcohol (Dispersion medium).

(ii) Aerosol

It is a colloidal solution of a liquid (dispersed phase) in gas (Dispersion medium). Example includes fog.

(iii) Hydrosol

It is a colloidal solution of a solid (dispersed phase) in water (Dispersion medium).

(iv) Benzosol :

It is a colloidal solution with benzene as dispersion medium.

(iii) Interaction between dispersed phase and dispersion medium:

Colloids are classified into lyophilic sols and lyophobic sols.

In lyophilic sols, the dispersed phase particles have great affinity (or love) for the dispersion medium. These sols are reversible. Examples include gum, gelatin, starch, proteins and rubber etc.

In lyophobic sols, the dispersed phase particles have no affinity (or love) for the dispersion medium. These sols are irreversible. Examples include solutions of metals such as gold and silver, metal hydroxides and metal sulphides.

The hydrophobic sols are less stable and easily coagulated than hydrophilic sols because, the stability of hydrophobic sols is due to charge only and the stability of hydrophilic sols is due to charge and solvation/ hydration