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AIIMS2005ChemistryStates of Matter

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

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