Which of the following species has a bond order other than 3?

C O

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C N^{-}

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N O^{+}

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{O_{2}}^{+}

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Solution

The correct option is D ${O_{2}}^{+}$
It is a well-known fact that $N_{2}$ contains a triple bond between the two $N$ atoms. Therefore, molecules with a total of $14$ electrons will have a bond order $3$ .
$e^{-} (C O) = 14$
$e^{-} ({C N}^{-}) = 14$
$e^{-} ({N O}^{- +}) = 14$
$e^{-} (O_{2}^{+}) = 15$
$∴$ $O_{2}^{+}$ has a bond order other than $3$ .

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Which of the following species has a bond order other than 3?

The correct option is D O2+It is a well-known fact that N2 contains a triple bond between the two N atoms. Therefore, molecules with a total of 14 electrons will have a bond order 3.e−(CO)=14 e−(CN−)=14 e−(NO−+)=14 e−(O+2)=15∴ O+2 has a bond order other than 3.