NEET Chemistry (general) Assertion Reason Question
Assertion (A): For a dibasic acid H2X, the equilibrium constant for the first ionization step (Ka1) is generally greater than that for the second ionization step (Ka2). | Reason (R): The first ionization step of a dibasic acid involves the dissociation of a neutral molecule into ions, whereas the second step involves the dissociation of an already charged species.
Both (A) and (R) are true and (R) is the correct explanation of (A).
Both (A) and (R) are true but (R) is not the correct explanation of (A).
(A) is true but (R) is false.
(A) is false but (R) is true.
Correct Answer
Detailed Explanation
The NCERT context indicates that dibasic acids have multiple ionization steps, with the first involving neutral molecules and generally having a higher Ka than the second step involving charged species.
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