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JEE Main levelSingle correct optionDifficulty 2 of 3rg205

Assertion (A): A gas above its critical temperature cannot be liquefied however high the pressure. Reason (R): Above the average kinetic energy of the molecules is too high for intermolecular attractions to hold them in the liquid state. Choose the correct option.

  1. ABoth A and R are true and R is the correct explanation of A
  2. BBoth A and R are true but R is not the correct explanation of A
  3. CA is true but R is false
  4. DA is false but R is true

Answer: A

Above compression increases density continuously without a phase transition, because thermal motion overcomes attraction. R correctly explains A.
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