Question

Which of the following catalysts is used in Haber’s process for the manufacture of ammonia ?

• A. Al$_2$O$_3$
• B. Fe + Mo
• C. CuO
• D. Pt

Hint:

Iron with molybdenum is commonly used in the Haber process for ammonia synthesis due to its ability to lower the activation energy of the reaction.

Answer 1

The Correct Option is B

Step 1: Understand Haber’s process.
Haber’s process is used to synthesize ammonia from nitrogen and hydrogen gas. The reaction is as follows: \[ N_2 (g) + 3H_2 (g) \xrightarrow{\text{Fe + Mo}} 2NH_3 (g) \]
Step 2: Identify the catalyst.
In Haber’s process, the catalyst used is a mixture of iron (Fe) and molybdenum (Mo), which speeds up the reaction without being consumed.
Step 3: Analyze the options.
- Fe + Mo (Option B) is the correct catalyst used in the Haber process. - Al$_2$O$_3$ (Option A) is used in some catalytic reactions but not in the Haber process. - CuO (Option C) is a catalyst for other reactions, but not for ammonia synthesis. - Pt (Option D) is a catalyst for hydrogenation reactions but not for ammonia synthesis.
Step 4: Apply to the options.
The correct answer is (B) Fe + Mo.
Final Answer: \[ \boxed{\text{Fe + Mo}} \]