Question: P and Q , respectively, are the sodium salts of | TestHub

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Paragraph: The reactions of $Cl_{2}$ gas with cold-dilute and hot-concentrated $NaOH$ in water give sodium salts of two (different) oxoacids of chlorine, $P$ and $Q$ , respectively. The $Cl_{2}$ gas reacts with $SO_{2}$ gas, in presence of charcoal, to give a product $R$ . $R$ reacts with white phosphorus to give a compound $S$ . On hydrolysis, $S$ gives an oxoacid of phosphorus, $T$ .

Question: $P$ and $Q$ , respectively, are the sodium salts of

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Solution:

${Cl}_{2} + cold dil. NaOH \to NaOCl + NaCl$
${Cl}_{2} + hot conc. NaOH \to {NaClO}_{3} + NaCl$
$NaOCl$ is salt of hypochlorous acid $= P$ .
${NaOCl}_{3}$ is salt of chloric acid $= Q$ .
$\begin{matrix} {Cl}_{2} + {SO}_{2} & \overset{Charcoal}{⟶} & {SO}_{2} {Cl}_{2} (R) \\ {SO}_{2} {Cl}_{2} + P_{4} & ⟶ & {PCl}_{5} (S) + {SO}_{2} \\ {PCl}_{5} + H_{2} O & ⟶ & H_{3} {PO}_{4} (T) + HCl \end{matrix}$

Chemistry - Complete Pblock- Question with Solution | TestHub

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