In Duma's method of estimation of nitrogen $0.35\,g$ of an organic compound gave $55\,ml$ of nitrogen collected at $300\,K$ temp. and $715\,mm$ pressure. The percentage of nitrogen in compound is (aqueous tension at $300\,K = 15\,mm$)
→$\begin{array}{*{20}{c}}
{C{H_3} - CH - CH = C{H_2}} \\
{|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} \\
{C{H_3}\,\,\,\,\,\,\,\,\,\,\,\,\,\,}
\end{array}$ $\xrightarrow{{{\text{D}}Br}}\,Product \,\left( {Major} \right)$ Product will be
→