Match List I with List II:

Choose the correct answer from the options given below:

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

The correct answer is option 4. (A)-(III), (B)-(IV), (C)-(I), (D)-(II).

Let us look at each of the options:

(A) Gel - (III) Cheese: Gel colloids have a solid-like consistency due to a three-dimensional network of interconnected particles, with a liquid dispersed throughout. Cheese is an example of a gel colloid where solid proteins form a network structure, trapping liquid (water and fat) within it.

(B) Foam - (IV) Whipped cream: Foam colloids are characterized by gas bubbles dispersed in a liquid or solid medium. Whipped cream is an example where air bubbles are dispersed in a liquid medium (cream), creating a foam-like structure.

(C) Emulsion - (I) Hair cream: Emulsion colloids consist of two immiscible liquids, where one is dispersed as droplets in the other. Hair cream typically contains oil droplets dispersed in water, forming an emulsion.

(D) Aerosol - (II) Dust: Aerosol colloids involve solid or liquid particles dispersed in a gas medium. Dust particles suspended in the air represent an aerosol colloid, where solid particles are dispersed in the gas phase.

So, each type of colloid (gel, foam, emulsion, aerosol) is correctly matched with its corresponding example (cheese, whipped cream, hair cream, dust) in option 4.