Assertion :If the temperature of a sample of gas is increased from $25^{o} C$ to $50^{o} C$ , the volume of gas will increase by 100 per cent. Reason: The volume of the given mass of a gas is directly proportional to absolute temperature.

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 D Assertion is incorrect but Reason is correct
As we know,

$V \propto T$ (Kelvin) at constant mass and pressure
so
$V_{50} / V_{25} = 323 / 298$

and the volume of gas will not increase by 100 per cent.

Thus, the assertion is incorrect but Reason is correct

Hence, the correct option is $D$

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