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Question

# Assertion :Volume : temperature ratio is constant for a fixed amount of gas at constant pressure. Reason: At constant pressure the volume of a given mass of a gas increases or decreases by 1/273 of its volume at 0oC.

A
Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
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B
Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
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C
Assertion is correct but Reason is incorrect
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D
Both Assertion and Reason are incorrect
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Solution

## The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for AssertionPV=nRT where, T= absolute temperatureSo at constant pressure for a fixed amount of gas, VT=constantT1=0o C=273 K V2T2=V1T1⟹V2V1=T2T1Both assertion and reason are correct.Now, VT=constant, V∝T (T is in Kelvin)The reason is the correct explanation for an assertion.

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