In Bosch process, when steam is passed over coke at high temperature ..................... is formed.

Answer

**Step-by-Step Solution:**

1. **Understanding the Bosch Process**: The Bosch process is a method used to produce hydrogen gas. It involves the reaction of steam with coke (a form of carbon) at high temperatures.

2. **Identifying the Reactants**: In this process, the main reactants are steam (H₂O) and coke (carbon, C).

3. **Setting Up the Reaction**: When steam is passed over red-hot coke, a chemical reaction occurs. The high temperature facilitates the reaction between steam and coke.

4. **Writing the Chemical Equation**: The reaction can be represented by the following balanced chemical equation:
\[ C + H_2O \rightarrow CO + H_2 \]
Here, carbon (C) reacts with water (H₂O) to produce carbon monoxide (CO) and hydrogen gas (H₂).

5. **Identifying the Products**: The products of this reaction are carbon monoxide (CO) and hydrogen gas (H₂). Together, they form a mixture known as water gas or synthesis gas (syngas).

6. **Conclusion**: Therefore, when steam is passed over coke at high temperature in the Bosch process, the product formed is a mixture of carbon monoxide and hydrogen gas, commonly referred to as water gas or syngas.

**Final Answer**: In the Bosch process, when steam is passed over coke at high temperature, water gas (syngas) is formed.

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