An ideal gas can't be liquefied because:
Correct answer: D. Forces between its molecules are negligible
- A. Its critical temperature is always above 0°C
- B. Its molecules are smaller in size
- C. It solidifies before becoming a liquid
- D. Forces between its molecules are negligible
Explanation
An ideal gas cannot be liquefied because intermolecular forces are negligible.For a gas to be converted into a liquid state,it should have significant intermolecular forces of attraction.D)Forces between its molecules are negligible.
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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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