Q.

Statement 1: pka1 of fumaric acid is more than maleic acid.Statement 2: Conjugate base of fumaric acid is stabilized by intramolecular H-bonding.

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a

Both statements 1 and 2 are correct

b

Statement 1 is correct and statement 2 is incorrect

c

Statement 1 is incorrect and statement 2 is correct

d

Both statements 1 and 2 are incorrect

answer is B.

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Detailed Solution

Conjugate base of maleic acid is stabilized by intramolecular H-bonding. No intramolecular H-bonding in conjugate base of fumaric acid. Hence Maleic acid is more stable and more acidic than fumaric acid.
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Statement 1: pka1 of fumaric acid is more than maleic acid.Statement 2: Conjugate base of fumaric acid is stabilized by intramolecular H-bonding.