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  4. White phosphorus on reaction with concentrated NaOH solution in an inert atmosphere of CO2, gives phosphine and compound (X). (X) on acidification with HCl gives compound (Y). The basicity of compound (Y) is :

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Q. 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 :

JEE MainJEE Main 2020The p-Block Elements - Part2

Solution:

$P_4 + 3NaOH + 3H_2O \rightarrow \underset{\text{(x)}}{3NaH_2PO_2}+PH_3$
$NaH_2PO_2 + HCl \rightarrow NaCl + \underset{\text{(Y)}}{H_3PO_2}$

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