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Allotropes of Phosphorus

White P react...

Question

White P reacts with caustic soda, the products are $P H_{3}$ and $N a H_{2} P O_{2}$ . This reaction involves :

A

oxidation

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B

disproportionation

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C

reduction

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D

neutralization

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Solution

The correct options are
A oxidation
B disproportionation
C reduction
Disproportionation is a specific type of redox reaction in which a species is simultaneously reduced and oxidised to form two different products.
The balanced reaction is as follows:
$P_{4} + N a O H \to P H_{3} + N a H_{2} P O_{2}$
0 -3 +1
reduction oxidation
The oxidation of P changes from $0$ to $- 3$ and $+ 1$ , so its a disproportionation reaction.

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