Question

Match the following

List I	List II
Solid dispersed in liquid	Emulsion
Liquid dispersed in liquid	Foam
Gas dispersed in liquid	Gel
Liquid dispersed in solid	Sol
Aerosol

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

Answer 1

To solve this we must know what forms emulsion, foam, gel, sol and aerosol. From this we can know the correct match.

Complete answer:
We are given that a solid is dispersed in liquid. When solid is dispersed in liquid a sol is formed. Sol is an aggregate of very fine solid particles dispersed in a liquid medium.
Thus, (A)-IV.
We are given that a liquid is dispersed in liquid. When liquid is dispersed in liquid emulsion is formed. Emulsion is a mixture of two immiscible liquids. It contains tiny particles of one liquid suspended in another liquid.
Thus, (B)-I.
We are given that a gas is dispersed liquid. When gas is dispersed in liquid foam is formed. Foam is a colloidal system in which gas is bubbled in a liquid medium.
Thus, (C)-II.
We are given that a liquid is dispersed solid. When liquid is dispersed in solid gel is formed. Gel is a colloidal system in which liquid particles are dispersed in a solid medium.
Thus, (D)-III.

**Thus, the correct option is (A) (A)-IV, (B)-I, (C)-II, (D)-III.

Additional Information:**
We know that a colloid is a mixture in which fine particles are scattered in a dispersion medium. The particles are solid in nature while the dispersion medium is a fluid. If the fluid used as a dispersion medium is water then the colloid is known as hydrosol. If the fluid used as a dispersion medium is air then the colloid is known as aerosol.

Note:
Examples of sol are milk of magnesia in which fine particles of solid magnesium hydroxide are dispersed in water, gold in water, etc. Examples of emulsion are milk, oil in water, water in oil, etc. Examples of foam are whipped cream, shaving cream, foam on beer, etc. Examples of gel are jelly, cheese, butter, etc.