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Question:
Answered & Verified by Expert
$$
\begin{aligned}
& \mathrm{P}_4+3 \mathrm{NaOH}+3 \mathrm{H}_2 \mathrm{O} \stackrel{\mathrm{CO}_2}{\longrightarrow} 3 \mathrm{X}+\mathrm{PH}_3 \uparrow \\
& \mathrm{X} \stackrel{\mathrm{HCl}(\mathrm{aq})}{\longrightarrow} \mathrm{Y}+\mathrm{NaCl}
\end{aligned}
$$
The incorrect statement about $\mathrm{Y}$ is
Options:
\begin{aligned}
& \mathrm{P}_4+3 \mathrm{NaOH}+3 \mathrm{H}_2 \mathrm{O} \stackrel{\mathrm{CO}_2}{\longrightarrow} 3 \mathrm{X}+\mathrm{PH}_3 \uparrow \\
& \mathrm{X} \stackrel{\mathrm{HCl}(\mathrm{aq})}{\longrightarrow} \mathrm{Y}+\mathrm{NaCl}
\end{aligned}
$$
The incorrect statement about $\mathrm{Y}$ is
Solution:
1248 Upvotes
Verified Answer
The correct answer is:
It is also called phosphonic acid
$\mathrm{P}_4+3 \mathrm{NaOH}+3 \mathrm{H}_2 \mathrm{O} \stackrel{\mathrm{CO}_2}{\longrightarrow} 3 \mathrm{NaH}_2 \mathrm{PO}_2+\mathrm{PH}_3$
(X)
$$
\mathrm{NaH}_2 \mathrm{PO}_2 \stackrel{\mathrm{HCl}(\mathrm{aq} \text {.) }}{\longrightarrow} \mathrm{H}_3 \mathrm{PO}_2+\mathrm{NaCl}
$$
(Y)
The name of $\mathrm{H}_3 \mathrm{PO}_2$ is hypophosphorous acid or phosphinic acid and not phosphoric acid.
(X)
$$
\mathrm{NaH}_2 \mathrm{PO}_2 \stackrel{\mathrm{HCl}(\mathrm{aq} \text {.) }}{\longrightarrow} \mathrm{H}_3 \mathrm{PO}_2+\mathrm{NaCl}
$$
(Y)
The name of $\mathrm{H}_3 \mathrm{PO}_2$ is hypophosphorous acid or phosphinic acid and not phosphoric acid.
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