Chemistry · May / June 2018 · Paper 11 · Question 25
5070Reversible reactions and equilibrium
The diagram shows three steps in the manufacture of sulfuric acid. [diagram: sulfur → step P → sulfur dioxide → step Q → sulfur trioxide → step R → sulfuric acid] In which steps is a catalyst used?
- AP, Q and R
- BQ and R only
- CQ only
- DR only
As printed in the paper
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Correct answer: C. Q only
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