Q33 / 160 · WBJEE 2010 · Chemistry
$$
\mathrm{X} \stackrel{\mathrm{PCl}_{\mathrm{s}}}{\longrightarrow} \mathrm{C}_2 \mathrm{H}_5 \mathrm{Cl}
$$
$$
\mathrm{Y} \stackrel{\mathrm{PCl}_5}{\longrightarrow} \mathrm{CH}_3 \mathrm{COCl}
$$
$\mathrm{X}$ and $\mathrm{Y}$ are
- A$\left(\mathrm{C}_2 \mathrm{H}_5\right)_2 \mathrm{O}$ and $\mathrm{CH}_3 \mathrm{CO}_2 \mathrm{H}$
- B$\mathrm{C}_2 \mathrm{H}_5 \mathrm{I}$ and $\mathrm{C}_2 \mathrm{H}_5 \mathrm{CHO}$
- Correct answerC$\mathrm{C}_2 \mathrm{H}_5 \mathrm{OH}$ and $\mathrm{CH}_3 \mathrm{CO}_2 \mathrm{H}$
- D$\mathrm{C}_2 \mathrm{H}_5 \mathrm{OH}$ and $\mathrm{C}_2 \mathrm{H}_5 \mathrm{CHO}$
Solution
$$
\begin{aligned}
& \text { Hints : } \mathrm{C}_2 \mathrm{H}_5 \mathrm{OH} \stackrel{\mathrm{PCl}_5}{\longrightarrow} \mathrm{C}_2 \mathrm{H}_5 \mathrm{Cl}+\mathrm{POCl}_3+\mathrm{HCl} \\
& \mathrm{CH}_3 \mathrm{CO}_2 \mathrm{H} \stackrel{\mathrm{PCl}_5}{\longrightarrow} \mathrm{CH}_5 \mathrm{COCl}+\mathrm{POCl}_3+\mathrm{HCl}
\end{aligned}
$$
Hence, the correct answer is option: 'C'.