Which one of the following is paramagnetic?

N_{2}

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N O

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C O

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O_{3}

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Solution

The correct option is B $N O$
Electronic configuration of $N O = σ {(1 s)}^{2} σ^{} (1 s)^{2} σ {(2 s)}^{2} σ^{} {(2 s)}^{2} σ {(2 p_{z})}^{2} π {(2 p_{x})}^{2} π {(2 p_{y})}^{2} π^{*} {(2 p_{x})}^{1}$

$∵$ $N O$ has one unpaired electron in an antibonding orbital.

$∴$ It is paramagnetic.

Hence, option B is correct.

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