Question

A molecule of _____ (hydrogen/ ammonia/ nitrogen) contains a triple bond.

Answer 1

Nitrogen

1. $\mathrm{H}$ has only $1$ electron in an atom so it shares its electron with other $\mathrm{H}$ atoms forming a single bond. e.g. $\mathrm{H}-\mathrm{H}$
2. ${\mathrm{NH}}_3$ consists of $\mathrm{N}\mathrm{and}\mathrm{H}$ atoms covalently bonded by sharing $3$ electrons from $\mathrm{N}$ with $3$atoms of $\mathrm{H}$ forming single bond and a lone pair remains with $\mathrm{N}$ atom. e.g. $\mathrm{H}-\underset{\underset{ }{\overset{|}{H}}}{\overset{\circ \circ }{N}}-\mathrm{H}$
3. $\mathrm{N}$ has $5$valence electron of which it shares $3$electrons with other $\mathrm{N}$ atom forming a triple bond and $1$ lone pair remains with $\mathrm{N}$ atoms. e.g. ${}_{\circ }{}^{\circ }\mathrm{N}\equiv {\mathrm{N}}_{\circ }^{\circ }$

So, A molecule of nitrogen contains a triple bond