Which of the following is correct regarding the heating of the air?

I. It expands and occupies more space.

II. It becomes heavier on heating

Only l

The correct answer is option 1. Only l.

The correct statement regarding the heating of air is Only I.

I. It expands and occupies more space: When air is heated, its molecules gain kinetic energy and move faster, causing them to spread out and occupy more space. This results in the expansion of air, which is a characteristic behavior of gases when heated.

II. It becomes heavier on heating: This statement is incorrect. When air is heated, its density decreases because the warmer air expands and becomes less dense than the surrounding cooler air. Therefore, heated air is lighter, not heavier, than the surrounding cooler air.

So, only statement I is correct.