A) sulphur trioxide and water
B) hydrogen and sulphurous acid
C) sulphur and water
D) hydrogen peroxide and sulphur.
Correct Answer: C
Solution :
On mixing aq. solution of\[{{\text{H}}_{\text{2}}}\text{S}\] and\[\text{S}{{\text{O}}_{\text{2}}}\]\[\underset{(aq.)}{\mathop{2{{H}_{2}}S+S{{O}_{2}}}}\,\xrightarrow{{}}2{{H}_{2}}O+3S\] Here, \[\text{S}{{\text{O}}_{\text{2}}}\]acts as an oxidising agent and oxidises moist\[\text{ }\!\!~\!\!\text{ }{{\text{H}}_{\text{2}}}\text{S}\] to S.
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