Above 1073 K, ………… reduces FeO to Fe while below 1073K, …………… reduces ` Fe_ 2 O _ 3 ` to Fe.

Answer

To solve the question, we need to identify the reducing agents used for the reduction of FeO to Fe and Fe2O3 to Fe at different temperatures.

### Step-by-Step Solution:

1. **Understanding the Reduction Process**:
- Reduction is a chemical reaction that involves the gain of electrons or the removal of oxygen from a substance. In this case, we are reducing iron oxides (FeO and Fe2O3) to iron (Fe).

2. **Identifying the Temperature Condition**:
- The question specifies two temperature conditions: above 1073 K and below 1073 K.

3. **Reduction of FeO Above 1073 K**:
- At temperatures above 1073 K, coke (carbon) is typically used as a reducing agent. The reaction can be represented as:
\[ \text{FeO} + \text{C} \rightarrow \text{Fe} + \text{CO} \]
- Here, coke (carbon) reduces FeO to iron (Fe) while producing carbon monoxide (CO).

4. **Reduction of Fe2O3 Below 1073 K**:
- At temperatures below 1073 K, carbon monoxide (CO) is used as the reducing agent. The reaction can be represented as:
\[ \text{Fe}_2\text{O}_3 + 3\text{CO} \rightarrow 2\text{Fe} + 3\text{CO}_2 \]
- In this case, carbon monoxide reduces Fe2O3 to iron (Fe) while producing carbon dioxide (CO2).

5. **Final Answer**:
- Therefore, the complete answer to the question is:
- Above 1073 K, **coke** reduces FeO to Fe.
- Below 1073 K, **carbon monoxide** reduces Fe2O3 to Fe.