Physics · Oct / Nov 2016 · Paper 12 · Question 20
5054Melting, boiling and evaporation
A sample of liquid at 100 °C is allowed to cool to a room temperature of 20 °C. The diagram shows how the temperature changes with time during the cooling process. At which time does the sample become completely solid? [graph: temperature/°C vs time, with points A, B, C, D marked on the time axis]
- AA
- BB
- CC
- DD
As printed in the paper
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Correct answer: C. C
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