Chemistry · May / June 2022 · Paper 12 · Question 29

The flow chart describes the preparation of ammonium sulfate. [flow chart: air → element 1 → Haber process; element 3 → Haber process; air → element 2 → Contact process; element 4 → Contact process; Haber process → ammonium sulfate; Contact process → ammonium sulfate] What are elements 1–4?

1. A1 nitrogen, 2 oxygen, 3 hydrogen, 4 sulfur
2. B1 nitrogen, 2 oxygen, 3 hydrogen, 4 oxygen
3. C1 oxygen, 2 nitrogen, 3 hydrogen, 4 sulfur
4. D1 oxygen, 2 nitrogen, 3 sulfur, 4 hydrogen

As printed in the paper