Multiple choice

Which among the following is formed by trapping gaseous bubbles in a liquid or solid ?

  1. Gel

  2. Sol

  3. Emulsion

  4. Foam

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

A foam is a substance that is formed by trapping many gaseous bubbles in a liquid or solid. A foam is normally an extremely complex system consisting of polydisperse gas bubbles separated by draining films.