Question

A colloidal system in which gas is dispersed in a liquid to form bubbles is known as ______.

Options

• foam

• sol

• aerosol

• emulsion

Answer 1

A colloidal system in which gas is dispersed in a liquid to form bubbles is known as foam.

Explanation:

Foam occurs when gas is dispersed in a liquid, producing bubbles that create a frothy system, unlike sols (solid in liquid), aerosols (solid or liquid in gas), or emulsions (liquid in liquid). This causes a characteristic bubbly texture seen in substances like soap lather or whipped cream.