Assertion :Greater the mole fraction of a gas in gaseous mixture, greater is the pressure it exerts. Reason: Pressure of gas is due to bombardment of gas molecules on the walls of the container.

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 B Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
Mole fraction = $x_{i} = \frac{n_{i}}{n_{1} + n_{2} + - - - -}$
Now, $P$ $\propto n_{i}$ , so pressure increases with mole fraction. Reason is correct.
Both reason and assertion is correct, that does not mean that reason is the correct explanation of assertion.

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