$\underset{(X)}{\mathop{\begin{matrix}
C{{H}_{3}}-CH-C{{O}_{2}}H \\
|\,\,\,\,\,\,\,\,\, \\
\,\,\,\,\,\,\,\,\,\,\,\,\,\,C{{H}_{2}}-OH \\
\end{matrix}}}\,$ $\xrightarrow{NaHC{{O}_{3}}}$ $\begin{matrix}
C{{H}_{3}}-CH-CO_{2}^{\Theta }+C{{O}_{2}} \\
|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, \\
\,\,C{{H}_{2}}-OH \\
\end{matrix}$

$[I]$ મિથેનોઇક એસિડ $[II]$ ઇથેનોઇક એસિડ
$[III]$ પ્રોપેનોઇક એસિડ $[IV]$ બ્યુટેનોઇક એસિડ
$C{H_2}CN\xrightarrow{{Na/{C_2}{H_5}OH}}\,A\,\xrightarrow{{HN{O_2}}}\,B\,\xrightarrow{{C{r_2}O_{_7}^{ - 2}}}\,C$


