When steam is passed over hot coke, it pro duces

Options

A. producer gas
B. water gas
C. laughing gas
D. coal gas

Answer

**Step-by-Step Solution:**

1. **Identify the Reactants**: The question states that steam is passed over hot coke. Here, the reactants are steam (H2O) and hot coke (which is primarily carbon, C).

2. **Understand the Reaction**: When steam reacts with hot coke, a chemical reaction occurs. The carbon in the coke reacts with the steam.

3. **Write the Chemical Equation**: The reaction can be represented by the following chemical equation:
\[ C + H_2O \rightarrow CO + H_2 \]
This indicates that carbon (C) from coke reacts with water (H2O) to produce carbon monoxide (CO) and hydrogen gas (H2).

4. **Identify the Product**: The products of this reaction are carbon monoxide (CO) and hydrogen gas (H2).

5. **Define the Mixture**: The mixture of carbon monoxide and hydrogen gas is commonly referred to as "water gas".

6. **Conclusion**: Therefore, when steam is passed over hot coke, it produces water gas, which is a mixture of carbon monoxide and hydrogen.

**Final Answer**: When steam is passed over hot coke, it produces water gas.

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