Which of the following species exhibit the paramagnetic behaviour?

N O

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O_{2}^{2 -}

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O_{2}^{+}

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O_{2}

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Solution

The correct options are
A $N O$
C $O_{2}$
D $O_{2}^{+}$
$O_{2}$ :
valence electrons= $6 + 6 = 12$
${(σ 2 s)}^{2} {(σ * 2 s)}^{2} {(σ 2 p)}^{2} {(π 2 p)}^{4} {(π^{} 2 p)}^{2}$
2 unpaired electrons-paramagnetic

4. $N O$ :
valence electrons= $6 + 5 = 11$
${(σ 2 s)}^{2} {(σ 2 s)}^{2} {(σ 2 p)}^{2} {(π 2 p)}^{4} {(π^{} 2 p)}^{1}$
one unpaired electron-paramagnetic

$O_{2}^{+}$ :
${(σ 2 s)}^{2} {(σ 2 s)}^{2} {(σ 2 p)}^{2} {(π 2 p)}^{4} {(π^{} 2 p)}^{1}$
one unpaired electron-paramagnetic

2. $O_{2}^{2 -}$ :
valence electrons= $12 + 2 = 14$
${(σ 2 s)}^{2} {(σ 2 s)}^{2} {(σ 2 p)}^{2} {(π 2 p)}^{4} {(π^{*} 2 p)}^{4}$
no unpaired electrons-diamagnetic

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Similar questions

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

$O_{2}, S_{2}, C N^{-}, N O^{+}, O_{2}^{2 +}, O_{2}^{2 -}, B_{2}, N_{2}^{2 -}, O_{2}^{+}, N O, N O_{2}, N_{2} O$ ___

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

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

O_{2}^{2 -}

O_{2}^{2 +}

O_{2}^{+}

O_{2}

O_{2}^{-}

O_{2}^{2 -}

C N^{-}, N O, O_{2}^{2 -}, O_{2}, N O_{2}, O_{2}^{-}, B_{2}, C_{2}, F_{2}^{-}

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