O-LevelPhysicsThermal Physics5054/11 · May/June 2019 · Q221 Mark

A gas is enclosed in a container of fixed volume. The gas gains heat energy from an external source. What happens to the molecules of the gas?

AThey expand.

BThey move faster inside the container.

CThey move further apart.

DThey vibrate with greater frequency.

✓ Correct answer

B: They move faster inside the container.

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Topic: Thermal Physics, O-Level Physics (syllabus 5054). Multiple choice, 1 mark.
Source: O-Level Physics, May/June 2019 Paper 1 Variant 1, question 22.

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