A) \[S+{{O}_{2}}\to S{{O}_{2}}~~\]
B) \[S{{O}_{2}}+{{H}_{2}}O\to {{H}_{2}}S{{O}_{4}}\]
C) \[2S{{O}_{2}}+{{O}_{2}}\to 2S{{O}_{3}}\]
D) None of these
Correct Answer: C
Solution :
In contact process of manufacture of \[{{H}_{2}}S{{O}_{4}}\]first of all \[S{{O}_{2}}\]is oxidized to \[S{{O}_{3}}\]by atmospheric oxygen in presence of \[{{V}_{2}}{{O}_{5}}\] as a catalyst. \[2S{{O}_{2}}+{{O}_{2}}\xrightarrow{{{V}_{2}}{{O}_{5}}}2S{{O}_{3}}\]
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