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Question

The correct order of increasing C−O bond length of CO,CO2−3,CO2 is:

A
CO23<CO2<CO
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B
CO2<CO23<CO
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C
CO<CO23<CO2
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D
CO<CO2<CO23
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Solution

The correct option is D CO<CO2<CO23
B.O in CO i.e.C+=O is 3, that of O=C=O is 2 while that of CO23 ion is 1.33. Since the bond length increases as the bond order decreases i.e CO<CO2<CO23.Thus option d is correct.

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