Match Column I with Column II

i-d; ii-c; iii-a; iv-b

The correct answer is option 1. i-d; ii-c; iii-a; iv-b.

Let us break down each match with detailed explanations:

i. Butter: d. Dispersion of liquid in solid

Butter is essentially a water-in-fat emulsion where tiny droplets of water are dispersed in a continuous fat phase. This makes butter a solid with liquid dispersed in it.

ii. Pumice stone: b. Dispersion of gas in solid

Pumice stone is a type of volcanic rock that forms through rapid cooling and depressurization, trapping gas bubbles inside its solid structure. These gas pockets make the rock porous and light.

iii. Milk: a. Dispersion of liquid in liquid

Milk is an emulsion, which is a colloid where tiny droplets of fat are dispersed throughout a continuous phase of water. This type of system involves one liquid (fat) being dispersed in another liquid (water).

iv. Paints: c. Dispersion of solid in liquid

Paints consist of solid pigment particles that are finely dispersed in a liquid medium (such as water or oil). The liquid serves as the continuous phase in which the solid particles are distributed.

Thus, the correct matches are:1. i-d; ii-c; iii-a; iv-b