Assertion :pH of $10^{- 8}$ HCl is not equal to 8. Reason: HCl does not ionize completely in very dilute aqueous solution.

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 Reason is correct

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Solution

The correct option is C Assertion is correct but Reason is incorrect
$H C l$ ionises completely because it is a strong electrolyte. $p H$ of acid is always less than $7.$ $H C l$ is a strong acid and it ionize completely in dilute solution thus its pH is always less than $7.$ Hence Assertion is correct but Reason is incorrect.

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