Maleic acid is stronger than fumaric acid because :
Correct answer: D. Maleic acid shows chelation or intramolecular H-bonding
- A. Fumaric acid shows intermolecular H-bonding
- B. Fumaric acid shows intramolecular H-bonding
- C. Maleic acid is dibasic acid
- D. Maleic acid shows chelation or intramolecular H-bonding
Explanation
Maleic acid shows intramolecular H-bonding (chelation) and thus-COOH is stabilized. Maleic acid, being a cis-isomer is capable of forming intra-hydrogen bond after losing H+ ion, making the conjugate base much stable than the trans form (fumaric acid) because both the oxygen atoms have strong interaction with the remaining H-atom.
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