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  4. The correct order of C-O bond length among CO,CO32-, CO2 is

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Q. The correct order of $C-O $ bond length among $CO,CO_3^{2-}$, $CO_2$ is

AIPMTAIPMT 2007Chemical Bonding and Molecular Structure

Solution:

Bond orders:
$CO _{3}^{2-}: 1.33$
$CO _{2}: 2$
$CO : 3$
The higher the bond order, the lesser the bond length.
So, the order of bond length of $C - O$ is:
$CO < CO _{2}< CO _{3}^{2-}$