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Question: Answered & Verified by Expert
A real gas would be most likely to obey the ideal gas laws at
ChemistryStates of MatterAP EAMCETAP EAMCET 2021 (25 Aug Shift 2)
Options:
  • A low temperature and low pressure
  • B high temperature and low pressure
  • C high temperature and high pressure
  • D low temperature and high pressure
Solution:
2363 Upvotes Verified Answer
The correct answer is: high temperature and low pressure
Real gas shows ideal gas behaviour at high temperature and low pressure.
e.g. Carbon monoxide (CO) would be most likely to obey the ideal gas law.
Under high temperature and low pressure, the volume V is very large and terms in real gas i.e. ‘
$\frac{a}{V^2}$ and $b$ can be neglected.
Hence, van der Waals' equation reduce to ideal gas equation, $p V=n R T$.

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