Question

Select the correct statement among the following.

• A. Hot air is heavier than cold air.
• B. Hot air is lighter than cold air.
• C. Hot air and cold air are equally heavy.
• D. Hot air occupies less volume than cold air.

Answer 1

The correct option is B Hot air is lighter than cold air.

When air heats up, it expands i.e. its volume increases and the density decreases. Because of this, hot air is lighter than cold air, and also occupies more space.