Exothermic reactions taking place in...........zone-

Options

A. Central zone
B. Combustion zone
C. Fusion zone
D. Reduction zone

Answer

To solve the question regarding where exothermic reactions take place in a blast furnace, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Structure of a Blast Furnace**:
- A blast furnace is a large structure used for smelting iron ore to produce iron. It consists of several zones, each with different temperatures and reactions occurring.

2. **Identify the Zones in a Blast Furnace**:
- The blast furnace has several distinct zones:
- **Combustion Zone**: The area where coke is burned, producing heat.
- **Reduction Zone**: Where iron oxides are reduced to iron.
- **Fusion Zone**: Where the molten metal is formed.
- **Central Zone**: Typically refers to the area where the molten metal collects.

3. **Focus on Exothermic Reactions**:
- Exothermic reactions are those that release heat. In the context of a blast furnace, combustion reactions are key examples of exothermic processes.

4. **Identify the Correct Zone**:
- The combustion zone is where coke (carbon) reacts with oxygen to produce carbon dioxide and heat. This reaction is exothermic.
- The other zones (reduction and fusion) involve different types of reactions that may not necessarily be exothermic.

5. **Conclusion**:
- Based on the analysis, the correct answer is that exothermic reactions take place in the **combustion zone** of the blast furnace.

### Final Answer:
Exothermic reactions take place in the **combustion zone** of the blast furnace.

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