MCQ
$S{O_2} + {H_2}S \to $ product. the final product is
  • ${H_2}O + S$
  • B
    ${H_2}S{O_4}$
  • C
    ${H_2}S{O_3}$
  • D
    ${H_2}{S_2}{O_3}$

Answer

Correct option: A.
${H_2}O + S$
a
(a) $S{O_2}$ acts as an oxidising agent particularly when treated with stronger reducing agents.

$S{O_2}$ oxidises ${H_2}S$ into $S$.

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$\begin{align}
   \begin{matrix}
   O\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,  \\
   ||\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,  \\
   H-O-C-C{{H}_{2}}-C{{H}_{2}}-CH-C{{O}_{2}}H  \\
   \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,|  \\
   \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\underset{\oplus }{\mathop{N}}\,{{H}_{3}}  \\
\end{matrix}\,\,\,\,\,(p{{K}_{a}}=2) \\ 
  (p{{K}_{a}}=4)\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,(p{{K}_{a}}=9) \\ 
\end{align}$

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