Q29 / 120 · VITEEE 2015 · Chemistry
With excess of water, both $\mathrm{P}_{2} \mathrm{O}_{5}$ and $\mathrm{PCl}_{5}$ give
- A$\mathrm{H}_{3} \mathrm{PO}_{3}$
- B$\mathrm{H}_{3} \mathrm{PO}_{2}$
- Correct answerC$\mathrm{H}_{3} \mathrm{PO}_{4}$
- D$\mathrm{H}_{4} \mathrm{P}_{2} \mathrm{O}_{7}$
Solution
Both $\mathrm{P}_{2} \mathrm{O}_{5}$ and $\mathrm{PCl}_{5}$ give $\mathrm{H}_{3} \mathrm{PO}_{4}$ With excess of water.
$\begin{array}{l}
\mathrm{P}_{2} \mathrm{O}_{5}+3 \mathrm{H}_{2} \mathrm{O} \longrightarrow 2 \mathrm{H}_{3} \mathrm{PO}_{4} \\
\mathrm{PCl}_{5}+4 \mathrm{H}_{2} \mathrm{O} \longrightarrow \mathrm{H}_{3} \mathrm{PO}_{4}+5 \mathrm{HCl}
\end{array}$
Hence, the correct answer is option: 'C'.