Boyle's law for a fixed amount of gas at constant temperature states that:
APressure is directly proportional to volume
B$P^2 V = $ constant
CPressure is inversely proportional to volume
DVolume is independent of pressure
Answer & Solution
Correct answer: C. Pressure is inversely proportional to volume
Boyle's law: at fixed $T$ and $n$, $PV = $ constant, so $P \propto 1/V$.
Squeeze a gas into half the volume at constant temperature and its pressure doubles. The $P$-$V$ curve at fixed $T$ is a hyperbola called an isotherm.
Option A is the opposite (direct proportion), which would mean compressing a gas reduces its pressure — physically absurd.
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