Q34 / 160 · AP EAMCET 2018 (24 Apr Shift 1) · Chemistry

What are $X, Y$ and $Z$ in the following reaction? Figure

  • Correct answer
    A
    $R-\mathrm{Cl} \quad \mathrm{HCl} \quad \mathrm{POCl}_3$
  • B
    $\begin{array}{lll}R O R & \mathrm{H}_3 \mathrm{PO}_3 & \mathrm{H}_2 \mathrm{O}\end{array}$
  • C
    $\mathrm{R}-\mathrm{Cl} \quad \mathrm{H}_2 \mathrm{O} \quad \mathrm{POCl}_3$
  • D
    ROR $\quad \mathrm{H}_2 \mathrm{O} \quad \mathrm{POCl}_3$

Solution

The reaction of alcohol $(R-\mathrm{OH})$ with $\mathrm{PCl}_5$, the reaction is leading to formation of $R-\mathrm{Cl}, \mathrm{HCl}$ and $\mathrm{POCl}_3$. $$ R-\mathrm{OH}+\mathrm{PCl}_5 \longrightarrow R-\mathrm{Cl}+\mathrm{HCl}+\mathrm{POCl}_3 $$

Hence, the correct answer is option: 'A'.

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