Most ideal gas in the following is:
Correct answer: B. He
- A. H2
- B. He
- C. N2
- D. CO
Explanation
The real gas that acts most like an ideal gas is helium. Because it exists in a single atom and its vander waals forces are very low.
This question appeared on the NUMS 2021 paper, which you can sit online with every answer explained.
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About Real and Ideal Gases
An ideal gas is modelled as particles with negligible volume and no intermolecular attraction, obeying Boyle's, Charles's and Avogadro's laws through PV = nRT. Real gases deviate from this behaviour, especially at high pressure and low temperature, because particle volume and attractive forces matter; the van der Waals equation explains these corrections.
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