O-LevelPhysicsThermal Physics5054/11 · May/June 2025 · Q141 Mark
Air is heated in a sealed container with constant volume. Why does the air pressure increase when the temperature increases?
AThe air molecules expand.
BThe air molecules bounce off each other more frequently.
CThe air molecules bounce off the walls more frequently.
DThe number of air molecules increases.
✓ Correct answer
C: The air molecules bounce off the walls more frequently.
Practise more questions on this topic
Oracle Prep sorts past-paper questions by topic, so you can drill Thermal Physics and see which topics are most likely to come up next.
Sign up free →