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Allotropes of Phosphorus

White phospho...

Question

White phosphorus reacts with caustic soda. The products are $P H_{3}$ and $N a H_{2} P O_{2}$ . This reaction is an example of________.

A

oxidation

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B

reduction

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C

neutralization

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D

disproportionation

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Solution

The correct option is D disproportionation
Reactions, in which a compound undergoes both oxidation and reduction simultaneously, are called disproportionation.

White phosphorus reacts with caustic soda. The products are phosphine $P H_{3}$ and sodium hypophosphite $N a H_{2} P O_{2}$ . This reaction is an example of disproportionation.

$P_{4} + 3 N a O H + 3 H_{2} O ⟶ 3 N a H_{2} P O_{2} + P H_{3}$

Option (D) is correct.

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