JEE Main 2026 Chemistry question

Chemistry Chemical Bonding and Molecular Structure JEE Main 2026

Consider the following molecules/species: (x) tropone, (y) acetone, (z) acetate ion. The correct order of carbon–oxygen double bond length is:

(A)x>y>z
(B)y>z>x
(C)z>x>yCorrect
(D)x>z>y

Answer: (C)

Solution

Acetate's two C–O bonds are resonance-equivalent (bond order 1.5, elongated). Tropone's carbonyl is also elongated due to

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Question ID VK-015395