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Question: Answered & Verified by Expert
3 moles of ethanol reacts with one mole of phosphorus tribromide to form 3 moles of bromo-ethane and one mole of $X$. Which of the following is $X$ ?
ChemistryAlcohols Phenols and EthersAP EAMCETAP EAMCET 2001
Options:
  • A $\mathrm{H}_3 \mathrm{PO}_4$
  • B $\mathrm{H}_3 \mathrm{PO}_2$
  • C $\mathrm{HPO}_3$
  • D $\mathrm{H}_3 \mathrm{PO}_3$
Solution:
2707 Upvotes Verified Answer
The correct answer is: $\mathrm{H}_3 \mathrm{PO}_3$
$\begin{array}{r}3 \mathrm{C}_2 \mathrm{H}_3 \mathrm{OH}+\mathrm{PBr}_3 \longrightarrow 3 \mathrm{C}_2 \mathrm{H}_3 \mathrm{Br}+\mathrm{H}_3 \mathrm{PO}_3 \\ (X)\end{array}$

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