JEE Main Chemistry question

Statement 1: The difference in the boiling points of equimolal solutions of HCl and HF decreases as their molarity is decreased. Statement 2: The extent of dissociation decreases steadily with increasing dilution.

(A)Assertion is True, Reason is True; Reason is correct explanation for Assertion
(B)Assertion is True, Reason is True; Reason is not correct explanation for Assertion
(C)Assertion is True, Reason is FalseCorrect
(D)Assertion is False, Reason is True

Answer: (C)

Solution

HCl, a strong acid, remains almost fully dissociated () at all dilutions, whereas HF, a weak acid, dissociates more (its , and hence , increases) as the solution is diluted, by Ostwald's dilution law. As dilution increases, HF's

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Question ID VK-143223