Multiple choice

An emulsion is a colloid of a

  1. gas in a liquid

  2. liquid in a liquid

  3. liquid in a gas

  4. gas in a solid

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

An emulsion is a colloid where one liquid is dispersed in another immiscible liquid. Examples include milk (fat in water), mayonnaise (oil in water), and butter (water in oil). A gas in liquid is foam, liquid in gas is aerosol, and gas in solid is solid foam.