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Question: Answered & Verified by Expert
The order of ka values of the following acids is :-

ChemistryGeneral Organic ChemistryJEE Main
Options:
  • A (i) > (iv) > (iii) > (iv)
  • B (iv) > (i) > (iii) > (ii)
  • C (iii) > (iv) > (i) > (ii)
  • D (iv) > (i) > (ii) > (iii)
Solution:
1748 Upvotes Verified Answer
The correct answer is: (iv) > (i) > (iii) > (ii)
Ka ∝ Acidity
(iv) is most acidic as its conjugate base is stabilized by the two −OH groups by intra-molecular H -bonding.
(ii) is least acidic as conjugate base is not stabiilized by H -bond.

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