In the extraction of zinc which gas is burnt in the jackets surrounding the retorts

Options

A. Water gas
B. Producer gas
C. Oil gas
D. Coal gas

Answer

To answer the question regarding which gas is burnt in the jackets surrounding the retorts during the extraction of zinc, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Extraction Process**:
- Zinc is primarily extracted from its ores, such as zinc sulfide (ZnS) and zinc oxide (ZnO). The process involves heating these ores in the presence of carbon or carbon compounds.

2. **Identifying the Gases Involved**:
- During the extraction of zinc, various gases can be produced, including carbon monoxide (CO), carbon dioxide (CO₂), and nitrogen (N₂).

3. **Recognizing the Role of Gases**:
- The gases produced during the reduction process are often utilized for heating purposes. In the case of zinc extraction, a specific mixture of gases is used for this purpose.

4. **Defining Producer Gas**:
- The mixture of gases produced from the incomplete combustion of carbon-containing materials is known as producer gas. This gas is rich in carbon monoxide and is used as a fuel.

5. **Conclusion**:
- In the context of the extraction of zinc, the gas that is burnt in the jackets surrounding the retorts is producer gas.

### Final Answer:
The gas burnt in the jackets surrounding the retorts during the extraction of zinc is **producer gas**.

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