The main reaction occuring in blast furnace during the extraction of iron form haematite is

Options

A. `Fe_(2)O_(3)+3CO to 2Fe+3CO_(2)`
B. `FeO+SiO_(2) to FeSiO_(3)`
C. `Fe_(2)O_(3)+3C to 2 Fe +3CO`
D. `CaO+SiO_(2) to CaSiO_(3)`

Explanation

To answer the question regarding the main reaction occurring in the blast furnace during the extraction of iron from hematite, we can break down the process into steps.

### Step-by-Step Solution:

1. **Identify the Ore**: The primary ore from which iron is extracted is hematite, which is chemically represented as Fe2O3.

2. **Reduction Reaction**: In the blast furnace, hematite undergoes a reduction reaction. The main reduction reaction can be represented as:
\[ \text{Fe}_2\text{O}_3 + 3\text{CO} \rightarrow 2\text{Fe} + 3\text{CO}_2 \]
This reaction shows that iron (Fe) is produced by reducing iron(III) oxide (Fe2O3) using carbon monoxide (CO).

3. **Formation of Slag**: Alongside the reduction of iron, impurities such as silicon dioxide (SiO2) are present in the ore. To remove these impurities, a slag is formed. The reaction for slag formation is:
\[ \text{CaO} + \text{SiO}_2 \rightarrow \text{CaSiO}_3 \]
Here, calcium oxide (CaO) reacts with silicon dioxide to form calcium silicate (CaSiO3), which is the slag.

4. **Conclusion**: The main reactions occurring in the blast furnace during the extraction of iron from hematite are:
- The reduction of hematite: \(\text{Fe}_2\text{O}_3 + 3\text{CO} \rightarrow 2\text{Fe} + 3\text{CO}_2\)
- The formation of slag: \(\text{CaO} + \text{SiO}_2 \rightarrow \text{CaSiO}_3\)

### Final Answer:
The correct reactions occurring in the blast furnace during the extraction of iron from hematite are the first and fourth reactions.

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