Haematite ore having magnetic property can be separated by magnetic separation In blast furnace, iron oxide is reduced by-

Options

A. Silica
B. `CO`
C. `C`
D. lime stone

Answer

To solve the question regarding the reduction of iron oxide in a blast furnace, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Ore**:
- The ore mentioned is haematite (Fe₂O₃), which is a primary source of iron. It is known for its magnetic properties and can be separated using magnetic separation.

2. **Blast Furnace Overview**:
- The blast furnace is a large structure used for extracting iron from its ore. It operates at high temperatures (around 900 to 1500 Kelvin) and involves several chemical reactions.

3. **Role of Coke**:
- In the blast furnace, coke (a form of carbon) is used as a fuel and a reducing agent. When coke is heated, it reacts with oxygen to produce carbon monoxide (CO).

4. **Reduction Reaction**:
- The carbon monoxide produced in the blast furnace acts as a reducing agent. It reacts with haematite (Fe₂O₃) to reduce it to iron (Fe).
- The chemical reaction can be represented as:
\[ \text{Fe}_2\text{O}_3 + 3\text{CO} \rightarrow 2\text{Fe} + 3\text{CO}_2 \]
- In this reaction, iron oxide (Fe₂O₃) is reduced to iron (Fe), and carbon dioxide (CO₂) is released as a byproduct.

5. **Conclusion**:
- Therefore, in the blast furnace, iron oxide is reduced by carbon monoxide (CO), which is produced from the combustion of coke.

### Final Answer:
In the blast furnace, iron oxide is reduced by carbon monoxide (CO).

---