Equivalent weight of H 3 PO 2 (molecular weight = M) when it disproportionates into PH 3…

Chemistry · JEE Main · NTA Exams — Redox Reactions and Electrochemistry

Equivalent weight of H₃PO₂ (molecular weight = M) when it disproportionates into PH₃ and H₃PO₃ is

M
\(\frac{3 \mathrm{M}}{4}\)
\(\underset{+1}{\mathrm{H}_{3}} \underset{+1}{\mathrm{PO}_{2}} \rightarrow \underset{-3}{\mathrm{PH}_{3}} \frac{\mathrm{MW}}{4}=\mathrm{EW}\)
\(\mathrm{H}_{3} \underset{\substack{\downarrow \\+1}}{\mathrm{PO}_{2}} \rightarrow \underset{\substack{\downarrow \\+3}}{\mathrm{H}_{3} \mathrm{PO}_{3}} \frac{\mathrm{MW}}{2}=\mathrm{EW}\)

Answer

(D) H _ 3 1 PO _ 2 3 H _ 3 PO _ 3 MW 2 = EW

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