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AIIMS2009ChemistryStates of Matter

Assertion : Compressibility factor for hydrogen varies with pressure with positive slope at all pressure. Reason : Even at low pressure, repulsive forces dominate for hydrogen gas

Options

  1. AIf both assertion and reason are true and reason is the correct explanation of assertion
  2. BIf both assertion and reason are true but reason is not the correct explanation of assertion
  3. CIf assertion is true but reason is false
  4. DIf both assertion and reason are false.

Correct answer

A. If both assertion and reason are true and reason is the correct explanation of assertion

Step-by-step solution

In case of H ₂ , compressibility factor increases with the pressure. At 273 ~K , Z>1 which shows that it is difficult to compress the gas as compared to an ideal gas. In this case, repulsive forces dominate.

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