Solution:
Sol: A colloidal system where a solid is dispersed in a liquid.
Examples: Paint, ink, blood, mud.
From List-II, Paint (III) is a solid dispersed in a liquid.
So, A - III.
Foam: A colloidal system where a gas is dispersed in a liquid.
Examples: Whipped cream, soap lather, shaving cream.
From List-II, Whipped cream (II) is gas (air) dispersed in cream (liquid).
So, B - II.
Gel: A colloidal system where a liquid is dispersed in a solid. Gels are typically semi-solid.
Examples: Jelly, cheese, butter, gelatin.
From List-II, Butter (IV) is primarily water (liquid) dispersed in solid fat.
So, C - IV.
Aerosol: A colloidal system where a solid or liquid is dispersed in a gas.
Examples: Fog, mist, cloud (liquid in gas); smoke (solid in gas).
From List-II, Cloud (I) is fine droplets of water (liquid) dispersed in air (gas).
So, D - I.
Combining these matches:
A - III
B - II
C - IV
D−I
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