Assertion :Avogadro's law hold's good only under similar conditions of temperature and pressure. Reason: Change in temperature or pressure brings about change in volume.

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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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 Assertion
Avogadro's law states that "equal volumes of all gases, at the same temperature and pressure, have the same number of molecules." For a given mass of an ideal gas, the volume and amount (moles) of the gas are directly proportional if the temperature and pressure are constant.
The Avogadro law Both temperature and pressure can be measured, and state changes can be observed so both are correct and reason are the correct explanation
so the answer is A

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