In `Fe` extraction, the roasting is carried out because

Options

A. All `FeO` be converted to `Fe_(2)O_(3)`
B. The formation of `FeSiO_(3)` slag is prevented
C. `Fe_(2)O_(3)` does not react with `SiO_(2)` to0 from slag
D. The formation of slag `(CaSiO_(3))` is enhanced.

Answer

To answer the question regarding why roasting is carried out in the extraction of iron (Fe), we can break down the process step by step:

### Step-by-Step Solution:

1. **Understanding Roasting**:
- Roasting is a metallurgical process where concentrated ore is heated in the presence of oxygen (air). This process converts the ore into its oxide form and helps in the removal of impurities.

**Hint**: Remember that roasting involves heating the ore with air, which leads to oxidation.

2. **Purpose of Roasting in Iron Extraction**:
- In the extraction of iron, particularly from iron(II) oxide (FeO), roasting is essential. During roasting, FeO is oxidized to iron(III) oxide (Fe2O3).

**Hint**: Focus on the transformation of FeO to Fe2O3 during the roasting process.

3. **Formation of Slag**:
- One of the key reasons for roasting is to prevent the formation of slag. When iron(II) oxide (FeO) reacts with silica (SiO2), it forms a compound known as slag (FeSiO3). Slag can complicate the extraction process.

**Hint**: Understand that slag formation can hinder the efficiency of metal extraction.

4. **Benefits of Converting FeO to Fe2O3**:
- By converting FeO to Fe2O3 through roasting, the formation of slag is avoided. Fe2O3 does not react with silica to form slag, making the extraction process more efficient.

**Hint**: Remember that avoiding slag formation is crucial for a smoother extraction process.

5. **Conclusion**:
- Therefore, roasting is carried out in the extraction of iron to convert FeO to Fe2O3, which prevents the formation of slag and allows for a more efficient extraction of iron.

**Hint**: Summarize the main points: roasting converts FeO to Fe2O3 and prevents slag formation.

### Final Answer:
Roasting is carried out in the extraction of iron to convert FeO to Fe2O3, preventing the formation of slag and facilitating a more efficient extraction process.