White phosphorus on reaction with concentrated NaOH solution in an inert atmosphere of $CO_{2}$ gives phosphine and compound (X). (X) on acidification with HCl gives compound $(Y)$ .
The basicity of compound $(Y)$ is

Question

White phosphorus on reaction with concentrated NaOH solution in an inert atmosphere of $CO_{2}$ gives phosphine and compound (X). (X) on acidification with HCl gives compound $(Y)$ .

The basicity of compound $(Y)$ is

TestHub · Accepted Answer

White phosphorus reacts with NaOH to form phosphine and NaH₂PO₂ (X), which on acidification gives H₃PO₂ (Y). The basicity of H₃PO₂ is 1.

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

$N a H_{2} P O_{2} + H Cl \to N a Cl + H_{3} P O_{2}$

Basicity of $H_{3} P O_{2}$ is one, since it has one ionizable H atom.

Chemistry - Complete P-block Question with Solution | TestHub

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