JEE Main Chemistry question

Which of the following best represents the structure of the carboxylate ion?

(A)The resonance hybrid with equal, partial-double-bond character and equal partial negative charge delocalized symmetrically over both oxygensCorrect
(B)A structure with one full C=O and one full C–O⁻ (localized, non-resonance structure)
(C)A structure placing the negative charge entirely on carbon
(D)None of these

Answer: (A)

Solution

X-ray structural data show the two C–O bond lengths in a carboxylate ion are identical (intermediate between single and double bond

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Question ID VK-149968