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The correct order of increasing C-O bond length of CO, ${CO}_{3}^{2 -}$ and CO₂

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${CO}_{3}^{2 -}$ < CO₂ < CO

CO₂ < ${CO}_{3}^{2 -}$ < CO

CO < ${CO}_{3}^{2 -}$ < CO₂

CO < CO₂ < ${CO}_{3}^{2 -}$

answer is D.

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Detailed Solution

(A)

has three Resonance structures
$∴$ Bond order = 4/3 = 1.33

(B)

C-O bond length in CO₂ is
115 pm (intermediate of C=O & $C \equiv O$ character)

(C)

C-O bond order = 3

Bond order in CO > CO₂ > C $O_{3}^{- 2}$ Bond length in CO < CO₂ < C $O_{3}^{- 2}$

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