O-LevelPhysicsThermal Physics5054/11 · May/June 2012 · Q121 Mark

A partially-inflated balloon is placed inside a bell jar. The bell jar is connected to an air pump. The air pump is switched on and air is removed from the bell jar. What happens to the pressure and to the volume of the gas inside the balloon?

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Adecreases decreases

Bdecreases increases

Cincreases decreases

Dincreases increases

✓ Correct answer

B: decreases increases

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Topic: Thermal Physics, O-Level Physics (syllabus 5054). Multiple choice, 1 mark.
Source: O-Level Physics, May/June 2012 Paper 1 Variant 1, question 12.

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