States of Matter - Result Question 45
####46. Select one correct statement. In the gas equation, $P V=n R T$
[1992]
(a) $n$ is the number of molecules of a gas
(b) $V$ denotes volume of one mole of the gas
(c) $n$ moles of the gas have a volume $V$
(d) $P$ is the pressure of the gas when only one mole of gas is present.
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Solution:
- (c) In the equation $P V=n R T, n$ moles of the gas have volume $V$.
In van der Waals equation, $n$ moles of gas occupies volume $V$ and exert pressure $P$ at a temperature $T$.
