Which catalyst is used in the Haber process for ammonia?
Answer and explanation
Correct answer: C. Finely divided iron
- Step 1: The industrial Haber-Bosch process synthesizes ammonia via the exothermic equilibrium .
- Step 2: Breaking the strong nitrogen-nitrogen triple bond () requires a heterogeneous transition metal catalyst to lower activation energy.
- Step 3: Finely divided porous iron promoted with potassium and aluminium oxides is used industrially as the catalyst.
Answer
Finely divided iron.
Why not the others: The alternative options (Nickel, Vanadium pentoxide, Platinum gauze) correspond to incorrect stoichiometric ratios, wrong reaction intermediates, or arithmetic evaluation errors.
Practise more Equilibrium and kinetics.
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