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    				| 1. | 3. Write the disproportionation reaction of H3PO3 | 
| Answer» On heating, orthophosphorus acid (H3PO3) disproportionates to give orthophosphoric acid (H3PO4) and phosphine (PH3). The oxidationstates of P in various species involved in thereaction are mentioned below. 4H3PO3 = 3H3PO4 + PH3 | |