1.

Assertion: The second dissociation constant of maleic acid is greater than fumaric acid. Reason: Higher the dissociation constant of acid more is acidic character.

Answer»

If both assertion and REASON are true and the reason is the correct explanation of the assertion.
If both assertion and reason are true but reason is not the correct explanation of the assertion
If assertion is true but reason is FALSE.
If assertion is false but reason is true.

Solution :Both fumaric and maleric ACIDS have two ionisable `H^(+)` i.e., protons. The maleate monoanion shows intramolecular `H-` bonding and thus requires more energy tto GIVE maleate dianion. It is therefore second dissociation of fumaric acid is more than maleic acid since former does not show intramolecular H-bonding.


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