Gujarati
4.Chemical Bonding and Molecular Structure
medium

Correct order of bond length is

A

$CO_3^{2 - } > C{O_2} > CO$

B

$C{O_2} > CO > CO_3^{2 - }$

C

$CO > C{O_2} > CO_3^{2 - }$

D

None of these

Solution

(a) From valency bond theory, bond order in $CO$,

i.e. $:\mathop C\limits^ – \equiv \mathop O\limits^ + :$ is $3,$ that of $O = C = O$ is $2$ 

while that of $CO_3^{2 – }$ ion is $1.33.$

Since the bond length increases as the bond order decreases, i.e. $CO < C{O_2} < CO_3^{2 – }$.

Standard 11
Chemistry

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