The non-ideal behaviour results chiefly from________________?
Correct answer: C. Intermolecular attractions and finite volume
- A. Intermolecular attraction and infinite volume
- B. Elastic collisions and finite volume
- C. Intermolecular attractions and finite volume
- D. Intermolecular attraction only
Explanation
Real gases deviate from ideal behaviour because their molecules attract one another and occupy finite volume. The ideal-gas model assumes no intermolecular attractions and negligible molecular volume. The likely wrong choice is d, which ignores the effect of finite molecular volume at high pressure.
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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.
Practise Gases
443 free Gases MCQs from Chemistry, each with the correct answer and an explanation. Unlimited attempts, no account needed.
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