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Question

P4+3NaOH+3H2O3Na(H2PO2)+PH3 is an example ofreaction.
  1. Disproportionation
  2. Neutralisation
  3. Double decomposition
  4. Pyrolytic


Solution

The correct option is A Disproportionation
0P4+3NaOH+3H2O3Na(H2+1PO2)+3PH3

Clearly, this is a disproportionation reaction. On the left hand side, elemental Phosphorus has oxidation state 0. In PH3 oxidation state of Phosphorus is -3. In Sodium hypophosphite, the oxidation state of Phosphorus is +1.

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