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O-LevelPhysicsThermal Physics5054/11 · Oct/Nov 2025 · Q141 Mark

A student heats a substance in which the particles are in fixed positions and vibrate. After a short period of heating, the particles start to flow past each other, but the forces between the particles remain strong. What has happened to the substance?

AIt has condensed.
BIt has evaporated.
CIt has frozen.
DIt has melted.

✓ Correct answer

D: It has melted.

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About this question

Topic
Thermal Physics, O-Level Physics (syllabus 5054). Multiple choice, 1 mark.
Source
O-Level Physics, Oct/Nov 2025 Paper 1 Variant 1, question 14.

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