Which species does not exhibit paramagnetism?

N_{2} +

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O_{2} -

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C O

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N O

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Solution

The correct option is B $C O$
In carbon monoxide the total number of valence electrons are $14$ .
The valence molecular orbital configuration of the $C O$ is $3 σ_{2}$ ,which is clear that there are no unpaired electrons,so carbon monoxide is diamagnetic.

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N_{2} O, N O, N O_{2}, O_{2}, N O_{2}^{+}, N O^{+}, C O^{+}

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Among the following the total no. of species which are paramagnetic

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N O

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O_{2}^{-}, O_{2}^{2 -}

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