O-LevelPhysicsThermal Physics5054/11 · Oct/Nov 2023 · Q151 Mark

A graph of temperature against time is shown for a material being heated from its solid state. Which row describes what is happening at X, Y and Z?

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Aboiling, solid becomes hotter, melting

Bliquid becomes hotter, boiling, gas becomes hotter

Csolid becomes hotter, melting, liquid becomes hotter

Dmelting, liquid becomes hotter, boiling

✓ Correct answer

D: melting, liquid becomes hotter, boiling

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Topic: Thermal Physics, O-Level Physics (syllabus 5054). Multiple choice, 1 mark.
Source: O-Level Physics, Oct/Nov 2023 Paper 1 Variant 1, question 15.

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