When superheated steam is passed through white hot coke, it gets reduced to a mixture of X and Y. Y is a highly inflammable gas. The mixture of X and Y is named as Z.
Identify Y.

Options

A. `CO_2`
B. `SO_2`
C. `H_2`
D. `NO_2`

Answer

To solve the problem, we need to analyze the reaction that occurs when superheated steam is passed through white hot coke. Here is a step-by-step breakdown:

### Step 1: Understand the Components
- **Superheated Steam**: This is water vapor that has been heated above its boiling point.
- **White Hot Coke**: Coke is a form of carbon that has been heated to a high temperature, making it very reactive.

### Step 2: Identify the Reaction
When superheated steam (H2O) is passed over white hot coke (carbon, C), a chemical reaction occurs. The carbon reacts with water vapor to produce carbon monoxide (CO) and hydrogen gas (H2).

### Step 3: Write the Chemical Equation
The reaction can be represented as:
\[ C + H2O \rightarrow CO + H2 \]
Here, the products are:
- **X**: Carbon monoxide (CO)
- **Y**: Hydrogen gas (H2)

### Step 4: Identify Y
According to the problem, Y is described as a highly inflammable gas. Among the products, hydrogen gas (H2) is known for its high flammability, making it the correct identification for Y.

### Step 5: Identify Z
The mixture of X and Y (CO and H2) is commonly referred to as "water gas" or "town gas," which can be denoted as Z.

### Conclusion
Thus, the answer to the question is:
- **Y**: Hydrogen gas (H2)