JEE Main Chemistry question

The weakest acid amongst the following is

(A)ClCH₂COOH
(B)HCOOH
(C)FCH₂CH₂COOHCorrect
(D)CH₂(I)COOH

Answer: (C)

Solution

Acid strength depends on both the electronegativity of the substituent and its distance from –COOH. ClCH₂COOH, CH₂(I)COOH and HCOOH all either have a halogen directly on the α-carbon or (for formic acid) no alkyl group at all, giving them all stronger acidity

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Question ID VK-149257