Match List I with List II

Choose the correct answer from the options given below:

A-III,B-I,C-IV,D-II

The correct answer is Option (2) → A-III,B-I,C-IV,D-II.

Let us explore each type of colloid and its corresponding example in detail:

A. Sol : III. Paints

A sol is a colloidal system where solid particles are dispersed in a liquid medium. The particles are very small and do not settle out of the solution due to gravity. Sols can be either lyophilic (solvent-loving) or lyophobic (solvent-hating). Example: Paints.

Paints are a good example of a sol because they consist of solid pigment particles dispersed in a liquid medium, usually water or an organic solvent. The pigment particles remain suspended, giving paints their color.

B. Gel : I. Butter

A gel is a colloidal system where the liquid is dispersed in a solid. It forms a semi-rigid structure. Gels are characterized by their ability to trap a liquid within a solid matrix. This gives them a jelly-like consistency. Example: Butter. 

Butter is a gel in which fat forms the solid network, and water is trapped inside it. This structure gives butter its semi-solid texture.

C. Foam : IV. Whipped Cream

A foam is a colloidal system where gas is dispersed in a liquid or a solid. In foam, gas bubbles are trapped within the liquid or solid. The dispersed phase is the gas, while the continuous phase is the liquid (in liquid foams) or solid (in solid foams). Example: Whipped Cream.

Whipped cream is an example of foam where air (gas) is dispersed in liquid cream (fat and water). The air bubbles trapped in the cream give it a light and fluffy texture.

D. Aerosol: II. Fog

An aerosol is a colloidal system where liquid or solid particles are dispersed in a gas. Aerosols can be either a dispersion of solid particles in gas or liquid droplets in gas. Example: Fog.

Fog is an example of an aerosol where tiny liquid water droplets are dispersed in air (gas). These droplets remain suspended, creating the visual phenomenon of fog.

Conclusion:

The correct match is A-III, B-I, C-IV, D-II because each example perfectly represents the respective type of colloid.