Question

The cause of floating of clouds in atmosphere is:

• A. low viscosity.
• B. low temperature.
• C. low pressure.
• D. low density.

Answer 1

The correct option is D low density.

Clouds are made of water vapour which is less dense than air. So buoyant force dominates the force of gravity and makes clouds reach such a height where the density of air is equal to the density of water vapour. So the correct answer is 'D'.