A) Oxidation
B) Reduction
C) Disproportionation
D) Neutralisation
Correct Answer: C
Solution :
In this reaction, phosphorus is simultaneously oxidised to \[Na{{H}_{2}}P{{O}_{2}}\]and reduced to\[P{{H}_{3}}\]. Hence this reaction is an example of disproportionation. \[{{\overset{o}{\mathop{P}}\,}_{4}}+3NaOH+3{{H}_{2}}O\to 3Na{{H}_{2}}\overset{+1}{\mathop{P}}\,O_{2}^{{}}+\overset{-3}{\mathop{P}}\,H_{3}^{{}}\]
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