Assertion :At $25^{o} C$ , the pH of $10^{- 8} M$ $H C l$ is $8$ . Reason: pH of acidic solution is always below $7$ at $25^{o} C$ .

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 the Reason is correct

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Solution

The correct option is D Assertion is incorrect but the Reason is correct
$p H$ of an acidic solution will be always less than $7$ on $p H$ scale.
Therefore, $p H$ of $10^{- 8} M H C l$ is not $8$
Here, Assertion is incorrect but the reason is correct.

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