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Q.
Which of the following contains a coordinate covalent bond ?
The p-Block Elements - Part2
Solution:
$N _{2} H _{5}^{+}$is formed from $N _{2} H _{4}$ which has a lone pair of electrons on '$N$' and positive charge on '$H$' takes away its electron and to complete duplet, a co-ordinate bond is present from $N$ to $H$.
$H _{4} N _{2}+ H ^{+} \rightarrow\left[ H _{4} N _{2} \rightarrow H \right]^{+}$