P_4 + 3 NaOH + 3 H_2 O xrightarrow{CO_2} 3 X | vedclass

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(A) $P_4 + 3 NaOH + 3 H_2 O \xrightarrow{CO_2} 3 NaH_2 PO_2 + PH_3$ $(X = NaH_2 PO_2)$ $NaH_2 PO_2 + HCl_{(aq)} \rightarrow H_3 PO_2 + NaCl$ $(Y = H_3

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It is also called phosphonic acid

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(A) $P_4 + 3 NaOH + 3 H_2 O \xrightarrow{CO_2} 3 NaH_2 PO_2 + PH_3$ $(X = NaH_2 PO_2)$ $NaH_2 PO_2 + HCl_{(aq)} \rightarrow H_3 PO_2 + NaCl$ $(Y = H_3 PO_2)$ $H_3 PO_2$ is hypophosphorous acid or phosphinic acid. It is a monobasic acid because it has only one $P-OH$ bond. It acts as a strong reducing agent. The oxidation state of $P$ in $H_3 PO_2$ is $+1$. Therefore, the statement that it is called phosphonic acid is incorrect, as phosphonic acid is $H_3 PO_3$.

$P_4 + 3 NaOH + 3 H_2 O \xrightarrow{CO_2} 3 X + PH_3 \uparrow$
$X \xrightarrow{HCl_{(aq)}} Y + NaCl$
The incorrect statement about $Y$ is

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$P_4 + 3 NaOH + 3 H_2 O \xrightarrow{CO_2} 3 X + PH_3 \uparrow$ $X \xrightarrow{HCl_{(aq)}} Y + NaCl$ The incorrect statement about $Y$ is