Ammonium sulfate is used as a fertiliser. It is produced from ammonia and sulfuric acid. Which words should be placed in gaps 1, 2 and 3? The .....1..... is produced by the .....2..... process, in which .....3..... is used as a catalyst.
- Aammonia; Contact; iron
- Bammonia; Haber; vanadium(V) oxide
- Csulfuric acid; Contact; vanadium(V) oxide
- Dsulfuric acid; Haber; iron