Assertion :pH of 10−7MHCl is less than 7 at 25∘C Reason: At very low concentration of HCl, contribution of H+ from water is considerable
A
Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
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B
Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
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C
Assertion is correct but Reason is incorrect
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D
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 As HCl is acid so at lower conc., hydrogen ion contribution from water is considered and it will have approximately 7 pH at 250C.