Assertion :At STP or any identical temperature and pressure, the volume occupied by a definite mass of any gas are identical. Reason: Equal mole of any monoatomic gas at the same temperature have the same average kinetic energy.

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Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Assertion is incorrect but Reason is correct

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Solution

The correct option is B Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
According to the ideal gas equation,
$P V = n R T$
at STP or any identical temperature and pressure, the volume occupied by a definite mass of any gas is identical and for one-mole gas, it is 22.4 litre.

The average kinetic energy of the molecules of any gas at the same temperature are equal. Under most circumstances, the molecules in gas do not interact with each other significantly. The temperature of a gas is directly related to the average kinetic energy of the gas, it must be that when two gases are at the same temperature, their molecules have the same average kinetic energy.

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