MCQ
When $SO_2$ is passed through a solution of $H_2S$ in water :-
- ASulphuric acid is formed
- BA clear solution is formed
- ✓A sulphur is precipitated
- DNo change observed
✓
Answer
Correct option: C.
A sulphur is precipitated
c
Peroxodisulphuric acid $\left(\mathrm{H}_{2} \mathrm{S}_{2} \mathrm{O}_{8}\right)$
Peroxodisulphuric acid $\left(\mathrm{H}_{2} \mathrm{S}_{2} \mathrm{O}_{8}\right)$
$\,\begin{array}{*{20}{c}}
{\begin{array}{*{20}{c}}
{O\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,O} \\
{||\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,||}
\end{array}} \\
{HO - S - O - O - S - OH} \\
{||\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,||} \\
{O\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,O}
\end{array}\,$ $+2 \mathrm{HOH} \rightarrow 2 \mathrm{H}_{2} \mathrm{SO}_{4}+\mathrm{H}_{2} \mathrm{O}_{2}$
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