Which of the following molecular species have unpaired electron(s)?

N_{2}

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F_{2}

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O_{2}^{-}

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O_{2}^{2 -}

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Solution

The correct option is C $O_{2}^{-}$
$O_{2}^{-}$ has one unpaired electron in its antibonding molecular orbital. Rest all have no unpaired electron.

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Question 28

Diamagnetic species are those which contain no unpaired electrons. Which among the following are diamagnetic?

(a) $N_{2}$

(b) $N_{2}^{2 -}$

(d) $O_{2}^{2 -}$

In $O_{2}^{-}$ , $O_{2} a n d O_{2}^{2 -}$ molecular species, the total number of anti-bonding electrons respectively are:

O_{2}^{2 +}

O_{2}^{+}

O_{2}

O_{2}^{-}

O_{2}^{2 -}

O_{2}^{+}

O_{2}

O_{2}^{-}

O_{2}^{2 -}

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