A) \[S+{{O}_{2}}\to S{{O}_{2}}\]
B) \[2S{{O}_{2}}+\,{{O}_{2}}\to 2S{{O}_{3}}\]
C) \[C+{{O}_{2}}\to C{{O}_{2}}\]
D) All of these
Correct Answer: B
Solution :
Platinised asbestos or vanadium pentaoxide \[({{V}_{2}}{{O}_{5}})\] is used as catalyst in the preparation of sulphur trioxide from \[\text{S}{{\text{O}}_{\text{2}}}\]and oxygen. \[\text{2S}{{\text{O}}_{2}}+{{O}_{2}}\xrightarrow[\text{or}\,{{\text{V}}_{\text{2}}}{{\text{O}}_{\text{5}}}]{\text{Pt}\text{.asbestos}}2S{{O}_{3}}+\text{Heat}\]
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