In van der Waals' equation of the gas law, the constant 'a' is a measure of

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intermolecular repulsion

intermolecular attraction

volume occupied by the molecules

relative velocity of gaseous molecules

answer is B.

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Detailed Solution

p+an2V2(V-nb)=nRT [van der waals' equation]The value of 'a' is measure of magnitude of intermolecular attractive forces within the gas and is independent of temperature and pressure.

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