1 \({{\rm{H}}_{\rm{2}}}\)
2 \({{\rm{C}}_{\rm{2}}}{{\rm{H}}_{\rm{5}}}\)
3 \({{\rm{N}}_{\rm{2}}}\)
4 \({\rm{N}}{{\rm{H}}_{\rm{3}}}\)
Explanation:
When ethylamine is heated with sodium metal, then hydrogen gas is evolved.
\[\begin{array}{l}
{\rm{2}}{{\rm{C}}_{\rm{2}}}{{\rm{H}}_{\rm{5}}}{\rm{N}}{{\rm{H}}_{\rm{2}}}{\rm{ + 2Na}} \to \\
\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,{\rm{2}}{{\rm{C}}_{\rm{2}}}{{\rm{H}}_{\rm{5}}}\overline {\rm{N}} {\rm{HN}}{{\rm{a}}^{\rm{ + }}}{\rm{ + }}{{\rm{H}}_{\rm{2}}} \uparrow
\end{array}\]
