The catalyst and promoter respectively used in the Haber's process of industrial synthesis of ammonia are

Options

A. Mv, `V_(2)O_(5)`
B. `V_(2)O_(5), Fe`
C. Fe,Mo
D. Mo,Fe

Answer

To solve the question regarding the catalyst and promoter used in the Haber process of industrial synthesis of ammonia, we can follow these steps:

### Step-by-Step Solution:

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

2. **Identify the Catalyst**: In the Haber process, a catalyst is used to increase the rate of the reaction without being consumed. The commonly used catalyst for this process is **finely divided iron (Fe)**. It helps in lowering the activation energy required for the reaction to proceed.

3. **Identify the Promoter**: A promoter is a substance that enhances the effectiveness of the catalyst. In the case of the Haber process, **molybdenum (Mo)** was historically used as a promoter. However, modern practices may involve other promoters as well.

4. **Conclusion**: Therefore, the catalyst and promoter used in the Haber process of industrial synthesis of ammonia are:
- Catalyst: Finely divided iron (Fe)
- Promoter: Molybdenum (Mo)

### Final Answer:
The catalyst and promoter respectively used in the Haber process of industrial synthesis of ammonia are finely divided iron and molybdenum.

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