In Lane process reduction of steam is carried out by heated

Options

A. Ca
B. Fe
C. K
D. Sr

Explanation

### Step-by-Step Solution

1. **Understanding the Lane Process**: The Lane process involves two main reactions: oxidation and reduction. We need to focus on the reduction of steam in this process.

2. **Oxidation Process**: In the oxidation step, ferrous (Fe) reacts with superheated steam (water vapor) at high temperatures (around 1025 to 1075 K) to produce ferrous oxide (Fe3O4) and hydrogen gas (H2). The reaction can be represented as:
\[ 3 \text{Fe} + 4 \text{H}_2\text{O} \rightarrow \text{Fe}_3\text{O}_4 + 4 \text{H}_2 \]

3. **Reduction Process**: In the reduction step, the produced ferrous oxide (Fe3O4) is reduced using water gas, which is a mixture of hydrogen (H2) and carbon monoxide (CO). The reaction can be represented as:
\[ \text{Fe}_3\text{O}_4 + 2 \text{H}_2 + \text{CO} \rightarrow 3 \text{Fe} + 2 \text{H}_2\text{O} + \text{CO}_2 \]

4. **Identifying the Reducing Agent**: The question asks for the presence of which element or compound is required for the reduction of steam in the Lane process. From the oxidation reaction, we see that ferrous is used to heat the steam.

5. **Conclusion**: Therefore, in the Lane process, the reduction of steam is carried out in the presence of ferrous.

### Final Answer
The correct answer is **ferrous** (option 2).

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