Which of the following gas always shows positive deviations from Boyle’s law even at ordinary temperatures

Which of the following gas always shows positive deviations from Boyle's law even at ordinary temperatures

  1. A

    Hydrogen

  2. B

    Oxygen

  3. C

    Nitrogen

  4. D

    Methane

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    Solution:

    Hydrogen and helium are small molecules. In these two gases always repulsions dominate;

    Z>1, PV>nRT ;

    Vanderwaal constant 'a' can be neglected;

    For one mole of gas

    PV-b=RT ; PV-Pb=RT; PV=Pb+RT; PV>RT; Z>1;Z=PVRT 

     

     

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