The Contact process is used to produce sulfuric acid. The stages in the process are shown below. 1 Dissolve sulfur trioxide in 98% concentrated sulfuric acid. 2 Heat sulfur strongly in air. 3 Add oleum to water. 4 Pass sulfur dioxide over a vanadium(V) oxide catalyst. Which order of steps is correct?
- A$4 \rightarrow 1 \rightarrow 2 \rightarrow 3$
- B$4 \rightarrow 2 \rightarrow 3 \rightarrow 1$
- C$2 \rightarrow 1 \rightarrow 4 \rightarrow 3$
- D$2 \rightarrow 4 \rightarrow 1 \rightarrow 3$