Name the catalyst and promoter in the Haber's process for the manufacture of ammonia.

Options

A. Fe and Mo
B. Mo and Fe
C. Ni and Mo
D. Fe and Ni

Answer

To answer the question regarding the catalyst and promoter in the Haber process for the manufacture of ammonia, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Haber Process**: The Haber process is a method used to synthesize ammonia (NH3) from nitrogen (N2) and hydrogen (H2) gases. The balanced chemical equation for this reaction is:
\[ N_2(g) + 3H_2(g) \rightarrow 2NH_3(g) \]

2. **Identify the Role of a Catalyst**: A catalyst is a substance that increases the rate of a chemical reaction without being consumed in the process. In the Haber process, a catalyst is necessary to facilitate the reaction between nitrogen and hydrogen at lower temperatures and pressures.

3. **Determine the Catalyst Used**: In the Haber process, the catalyst used is **iron (Fe)**. Iron helps in speeding up the reaction between nitrogen and hydrogen to form ammonia.

4. **Understand the Role of a Promoter**: A promoter is a substance that enhances the effectiveness of a catalyst. It does not have catalytic properties on its own but helps improve the performance of the catalyst.

5. **Identify the Promoter Used**: In the Haber process, the promoter used alongside iron is **molybdenum (Mo)**. Molybdenum helps to increase the efficiency of iron as a catalyst.

6. **Summarize the Findings**: Therefore, in the Haber process for the manufacture of ammonia:
- The catalyst is **iron (Fe)**.
- The promoter is **molybdenum (Mo)**.

### Final Answer:
- Catalyst: **Iron (Fe)**
- Promoter: **Molybdenum (Mo)**

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