Which of the following show paramagnetism?

N O_{2}

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N O

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K O_{2}

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N a_{2} O

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Solution

The correct options are
A $N O_{2}$
B $N O$
C $K O_{2}$
$N O_{2}$ has valence electrons =17
odd electrons-paramagnetic
$N O$ has valence electrons =11
odd-paramagnetic
$K O_{2}$ has valence electrons =13
odd-paramagnetic
$N a_{2} O$ has valence electrons =8
all paired electrons-diamagnetic
$A, B, C$ are correct options.

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