JAMB Chemistry 2023 Paper

Concept:The contact process is an industrial method specifically used to manufacture sulfuric acid.Explanation:In this process, sulfur dioxide, $\mathrm{SO}_2$, is oxidised to sulfur trioxide, $\mathrm{SO}_3$.A vanadium(V) oxide catalyst, $\mathrm{V}_2\mathrm{O}_5$, is commonly used to speed up the reaction.The $\mathrm{SO}_3$ gas is then absorbed in concentrated sulfuric acid, $\mathrm{H}_2\mathrm{SO}_4$, to form oleum, $\mathrm{H}_2\mathrm{S}_2\mathrm{O}_7$.Finally, the oleum is carefully diluted with water to produce more concentrated sulfuric acid, $\mathrm{H}_2\mathrm{SO}_4$.Therefore, the correct option is A: sulfuric acid, $\mathrm{H}_2\mathrm{SO}_4$.Answer:A. sulfuric acid, $\mathrm{H}_2\mathrm{SO}_4$