Question : 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.
Option 1: Only I
Option 2: Neither I nor II
Option 3: Both I and II
Option 4: Only II
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Correct Answer: Only I
Solution : The correct option is Only I .
Heat causes the molecules in the air to gain kinetic energy, which makes them travel faster and causes the air to expand. The volume that the air occupies grows as a result. This expansion is frequently seen in a variety of atmospheric and laboratory situations and is a basic principle of thermodynamics.
Statement II is incorrect since air often gets lighter per volume when it gets heated. This is because, in comparison to colder air, warmer air has a lower density (mass per unit volume).
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