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  4. The ONO angle is maximum in

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Q. The ONO angle is maximum in

Bihar CECEBihar CECE 2010Chemical Bonding and Molecular Structure

Solution:

In $N O_{3}^{-}, N$ atom undergoes $s p^{2}-$ hybridisation. Thus, the ion has trigonal planar geometry with bond angle $120^{\circ} C$.
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$NO _{2}^{-}$ has angular geometry ( $s p^{2}$ hybridisation) due to presence of one lone pair of electrons on $N$ atom. Bond angle is $116^{\circ} . NO _{2}$ has angular geometry ( $sp ^{2}$ hybridisation) with bond angle $134^{\circ}$ $NO _{2}^{+}$ (nitronium ion) has linear structure (sp hybridisation) with bond angle $180^{\circ} .$
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$\therefore $ The bond angle is maximum in $NO _{2}^{+}$, ie, $180^{\circ}$.