Assertion :pH of 10 M $H C l$ aqueous solution is less than 1. Reason: pH is negative logarithm of $H^{+}$ concentration.

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
pH can be negative. It is just a standard range for measuring the acidity or basicity.
$p H = - l o g [H^{+}]$

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Assertion :pH of 10 M HCl aqueous solution is less than 1. Reason: pH is negative logarithm of H+ concentration.

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for AssertionpH can be negative. It is just a standard range for measuring the acidity or basicity.pH=−log[H+]

Assertion :pH of 10 M $H C l$ aqueous solution is less than 1. Reason: pH is negative logarithm of $H^{+}$ concentration.

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
pH can be negative. It is just a standard range for measuring the acidity or basicity.
$p H = - l o g [H^{+}]$