Moderate

Which of the following behaves most closely like an ideal gas ?

Correct answer: A. He

  • A. He
  • B. N2
  • C. O2
  • D. H2

Explanation

Helium has extremely weak intermolecular attractions and therefore shows very small departures from ideal-gas behaviour under ordinary conditions. Nitrogen, oxygen, and hydrogen have stronger non-ideal interactions by comparison.

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