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Acrylic acid is a stronger acid than benzoic acid.

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in Chemistry – Class 12 by (188k points)
Acrylic acid is a stronger acid than benzoic acid.

(a) True

(b) False

I got this question during an interview.

My doubt stems from Carboxylic Acids Chemical Reactions topic in section Aldehydes, Ketones and Carboxylic Acids of Chemistry – Class 12

1 Answer

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Correct choice is (b) False

To explain I would say: Both compounds contain a sp^2 hybridised carbon atom next to the COOH group, but the double bond of a benzene ring is less electron releasing in nature than the vinyl carbon double bond of acrylic acid. This is because delocalisation in the resonance structures of benzoic acid destroys its aromatic character. Hence, benzoic acid is stronger than acrylic acid.

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