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Bond Length

The correct o...

Question

The correct order of increasing $C - O$ bond length of $C O, C O_{3}^{2 -}, C O_{2}$ is:

A

C O_{3}^{2 -} < C O_{2} < C O

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B

C O_{2} < C O_{3}^{2 -} < C O

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C

C O < C O_{3}^{2 -} < C O_{2}

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D

C O < C O_{2} < C O_{3}^{2 -}

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Solution

The correct option is D $C O < C O_{2} < C O_{3}^{2 -}$
B.O in CO i.e. $- C + = O$ is 3, that of $O = C = O$ is 2 while that of $C O_{3}^{2 -}$ ion is 1.33. Since the bond length increases as the bond order decreases i.e $C O < C O_{2} < C O_{3}^{2 -}$ .Thus option d is correct.

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