1 \(\mathrm{CH}_{3} \mathrm{NC}\)
2 \(\mathrm{CH}_{3} \mathrm{COOC}_{2} \mathrm{H}_{5}\)
3 \(\mathrm{CH}_{3} \mathrm{COOH}\)
4 \(\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{OH}\)
Explanation:
Hydrolysis of acetonitrile in acid medium, gives acetic acid.
\[\begin{array}{*{20}{l}}
{{\text{C}}{{\text{H}}_{\text{3}}} - {\text{C}} \equiv {\text{N + 2}}{{\text{H}}_{\text{2}}}{\text{O}}\xrightarrow{{{{\text{H}}^ + }/{{\text{H}}_{\text{2}}}{\text{O}}}}} \\
{{\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu}\,\,\,\,\,\,\,\,\,\,\,\, {\text{C}}{{\text{H}}_{\text{3}}}{\text{COOH + N}}{{\text{H}}_{\text{3}}}}
\end{array}\]