13. HYDROCARBONS (HM)
Explanation:
(b) $\begin{array}{*{20}{c}}
{CH - COOK} \\
{||\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} \\
{CH - COOK}
\end{array} + 2{H_2}O\xrightarrow{{Electrolysis}}$ $\begin{array}{*{20}{c}}
{CH} \\
{||\,\,\,\,\,} \\
{CH}
\end{array} + 2C{O_2}$
$\begin{array}{*{20}{c}}
{C{H_2} - COONa} \\
{|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} \\
{C{H_2}COONa\,\,\,\,\,}
\end{array} + 2{H_2}O\xrightarrow{{Electrolysis}}$ $\begin{array}{*{20}{c}}
{C{H_2}} \\
{||\,\,\,\,\,\,} \\
{C{H_2}}
\end{array} + 2C{O_2} + 2NaOH + {H_2}$