Sulfur dioxide in the atmosphere can lead to acid rain. This happens in two steps. 1 oxidation of $\text{SO}_2$ to $\text{SO}_3$ 2 formation of dilute $\text{H}_2\text{SO}_4$. Which row gives the atmospheric catalyst for step 1 and the reagent for step 2?
Chemistry 9701 · AS & A Level · Nitrogen and sulfur