Question
Indicate the type of bonds present in $\mathrm{NH}_4 \mathrm{NO}_3$ and state the mode of hybridisation of two N -atoms in it.
✓
Answer
$\mathrm{NH}_4^{+}$ion contains covalent and dative bonds. (It is formed by donation of lone pair of electrons on N in $\mathrm{NH}_3$ to $\mathrm{H}^{+}$ ion). $\mathrm{NH}_3^{-}$ion also contains covalent and dative bonds. Bond between $\mathrm{NH}_4^{+}$and $\mathrm{NH}_4^{-}$ions is ionic.
N of $\mathrm{NH}_3^{+}$ion is sp hybridised and is tetrahedral. N of $\mathrm{NH}_3^{-}$ion is $\mathrm{sp}^2$ hybridised and is planar.
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