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Molecular Orbitals of Carbon

Question

Among the following, the paramagnetic compound is:
$N a_{2} O_{2}$
$P_{2} O_{5}$
$N_{2} O$
$K O_{2}$

A

K O_{2}

B

P_{2} O_{5}

C

N a_{2} O_{2}

D

N_{2} O

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Solution

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From figure it can be seen that, only $O_{2}^{-}$ have one unpaired electron and $K O_{2}$ is paramagnetic.

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