Question

Name the catalyst used in the manufacture of ammonia by Haber’s process.

• A. Nickel
• B. Platinum
• C. Finely divided Iron (Fe) with Molybdenum (Mo) as a promoter
• D. Vanadium pentoxide

Hint:

Remember the industrial conditions of Haber process: High pressure, moderate temperature, and Iron catalyst with molybdenum promoter.

Answer 1

The Correct Option is C

Concept: The Haber process is used for the industrial synthesis of ammonia from nitrogen and hydrogen. \[ N_2 + 3H_2 \rightleftharpoons 2NH_3 \] This reaction occurs under:
• High pressure (\(\sim 200\,atm\))
• Moderate temperature (\(\sim 450^\circ C\))
• Suitable catalyst

Step 1: Identify the catalyst used. The reaction is catalyzed by \[ \text{Finely divided Iron (Fe)} \]

Step 2: Role of the promoter. To increase the efficiency of the catalyst, a promoter such as \[ \text{Molybdenum (Mo)} \] is added.

Step 3: Final identification. Thus the catalyst system used in Haber’s process is: \[ \boxed{\text{Finely divided Iron with Molybdenum as promoter}} \]