Assertion :The ratio by volume of gaseous reactants and products is in agreement with their molar ratio. Reason: Volume of a gas is proportional to the number of moles of a gas.

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 incorrect but Reason is correct

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Both Assertion and Reason are correct

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Solution

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
According to ideal gas equation, $P V = n R T$ .
Thus, the volume of a gas is directly proportional to its number of moles.
Hence, the reason is correct.
The ratio by volume of gaseous reactants and products is in agreement with their molar ratio as volume is directly proportional to the number of moles of a gas.
Hence, the assertion is correct, and the reason is the correct explanation of for assertion

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