The production of dihydrogen obtained from coal gasification can be increased by reacting carbon monoxide of syngas mixture with steam in presence of a catalyst iron chromate. What is this process called?

Options

A. Hydrogen reaction
B. Water - gas shift reaction
C. Coal - gas shift reaction
D. Syn gasification

Explanation

To solve the question regarding the process that increases the production of dihydrogen from coal gasification by reacting carbon monoxide with steam in the presence of a catalyst (iron chromate), we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Components**:
- The question mentions coal gasification, which produces a mixture known as syngas (synthesis gas), primarily composed of hydrogen (H₂), carbon monoxide (CO), and some carbon dioxide (CO₂).
- The process involves reacting carbon monoxide (CO) with steam (H₂O).

2. **Identifying the Reaction**:
- The reaction that occurs when carbon monoxide reacts with steam can be represented as:
\[ \text{CO} + \text{H}_2\text{O} \rightarrow \text{CO}_2 + \text{H}_2 \]
- This reaction produces carbon dioxide (CO₂) and dihydrogen (H₂).

3. **Role of the Catalyst**:
- The presence of a catalyst, in this case, iron chromate, is crucial as it helps to increase the rate of the reaction without being consumed in the process.

4. **Naming the Process**:
- The specific process that describes the reaction of carbon monoxide with steam to produce hydrogen is known as the **Water Gas Shift Reaction**.

5. **Conclusion**:
- Therefore, the process that increases the production of dihydrogen from coal gasification by reacting carbon monoxide with steam in the presence of a catalyst is called the **Water Gas Shift Reaction**.

### Final Answer:
The process is called the **Water Gas Shift Reaction**.