Milk is a colloid in which :A.liquid is dispersed in liquid B.gas is dispersed in waterC.sugar is dispersed in water D.solid is dispersed in liquid

Milk is an example of a colloid where small particles of one substance are dispersed throughout another. Let's analyze the options given:

A. Liquid is dispersed in liquid: This describes an emulsion, where both the dispersed phase and the dispersion medium are liquids. However, this is not the case for milk.

B. Gas is dispersed in water: This refers to a foam, where gas bubbles are dispersed in a liquid. This doesn't apply to milk.

C. Sugar is dispersed in water: This is a solution, not a colloid. When sugar dissolves in water, it forms a homogeneous solution, not a colloid.

D. Solid is dispersed in liquid: This is correct. Milk is a colloidal system where fat globules (solid particles) are dispersed in water (liquid). These tiny fat droplets remain suspended in the liquid, making milk an example of a colloid called an emulsion.

Correct answer: D. Solid is dispersed in liquid