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  4. Smallest internuclear distance is found in

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Q. Smallest internuclear distance is found in

AIIMSAIIMS 2001Chemical Bonding and Molecular Structure

Solution:

In $O _{2}$, the bond order $=2$

In $O _{2}^{+}$, the bond order $=2.5$

In $O _{2}^{-}$, the bond order $=1.5$

In $O _{2}^{-2}$, the bond order $=1$

As the bond order in $O _{2}{ }^{+}$ is highest,

so its internuclear distance is smallest.