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Give the disproportionation reaction of H3PO3.
CBSE | Chemistry | Class 12 | NCERT | The p-Block Elements
Give the disproportionation reaction of H3PO3.

When we heat orthophosphorus acid (H3​PO3​), it undergoes disproportionation reaction to yield orthophosphoric acid (H3​PO4​) and phosphine (PH3​). The oxidation states of phosphorous atom in various species involved in the reaction are mentioned as follows: 4{{H}_{3}}\overset{+3}{\mathop{P}}\,{{O}_{3}}\to 3{{H}_{3}}\overset{+5}{\mathop{P}}\,{{O}_{4}}+\overset{-3}{\mathop{P}}\,{{H}_{3}}

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