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In the reaction,
$A$ is
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$A$ is
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Verified Answer
The correct answer is:
$\mathrm{H}_3 \mathrm{PO}_2$ and $\mathrm{H}_2 \mathrm{O}$
When diazonium salt is treated with $\mathrm{H}_3 \mathrm{PO}_2$ followed by hydrolysis, it diazonium group is replaced by $-\mathrm{H}$ resulting to the formation of hydrocarbon. Thus, $A$ must be $\mathrm{H}_3 \mathrm{PO}_2 / \mathrm{H}_2 \mathrm{O}$.
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