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NEET levelSingle correct optionDifficulty 1 of 3rg090

A gas cannot be liquefied at any pressure if

  1. Aits temperature is above the critical temperature
  2. Bits temperature is below the critical temperature
  3. Cits pressure is above the critical pressure
  4. Dit is at the Boyle temperature

Answer: A

Above the critical temperature the thermal energy exceeds the attractive energy, so no amount of compression produces a separate liquid phase. Liquefaction requires to be at or below .
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