Question

The reaction ${P_4 + 3NaOH + 3H_2O -> 3NaH_2PO_2 + PH_3}$ is an example of

• A. Disproportionation reaction
• B. neutralization reaction
• C. double decomposition reaction
• D. Pyrolytic reaction

Answer 1

Answer: (A)

Disproportionation reaction

Answer 2

$P _{4}+3 NaOH +3 H _{2} O \rightarrow PH _{3}+3 NaH _{2} PO _{2}$ In reactant $P$ is present in $(0)$ oxidation state and in $PH _{3}$, it is present in $(-3)$ oxidation state and in $NaH _{2} PO _{2}$ it is present in $(+1)$ oxidation state. P undergoes both oxidation and reduction. So this is an example of disproportionation reaction.