Multiple choice

Which of the following is an example of diffusion?

  1. Sponge soaking up water.

  2. Sprinkling water on plants.

  3. Naphthalene balls disappearing in air after leaving uncovered for a while.

  4. Spraying perfume in air.

  5. Wax melting in the sun.

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

The intermixing of particles of two substances on their own is known as diffusion. Here, the particles of perfume spray mix in the air in the room and the whole room begins to smell nice. This is diffusion.