During the Haber process, hydrogen and nitrogen combine to produce ammonia in the presence of a catalyst. Which of these two reactants is separated by fractional distillation, and what catalyst is used in the Haber process?
- Ahydrogen obtained by fractional distillation; catalyst iron
- Bhydrogen obtained by fractional distillation; catalyst nickel
- Cnitrogen obtained by fractional distillation; catalyst iron
- Dnitrogen obtained by fractional distillation; catalyst nickel