Red hot coke+Steam`overset(1000^(@)C)tounderset("Steam")underset(uarr)(X)overset(500^(@)C)underset("Catalyst(Y))to(Z)+H_(2)`
Catalyst `'Y'` is

Options

A. `V_(2)O_(5)`
B. `Cr_(2)O_(3)`
C. `Fe_(2)O_(3)`
D. `Fe_(2)O_(3)+Cr_(2)O_(3)`

Explanation

To solve the question regarding the catalyst 'Y' used in the reaction involving red hot coke and steam, we can break down the process step by step.

### Step 1: Understanding the Initial Reaction
The reaction begins with red hot coke (carbon) reacting with steam (water vapor) at a high temperature of 1000°C.

**Reaction:**
\[ \text{C (s)} + \text{H}_2\text{O (g)} \rightarrow \text{CO (g)} + \text{H}_2 (g) \]

This reaction produces carbon monoxide (CO) and hydrogen gas (H₂). This mixture of CO and H₂ is commonly referred to as "water gas."

**Hint:** Identify the reactants and products in the first step of the reaction.

### Step 2: Identifying the Second Step
In the second step, the water gas (CO + H₂) is further reacted with steam at a lower temperature of 500°C in the presence of a catalyst 'Y'.

**Reaction:**
\[ \text{CO (g)} + \text{H}_2\text{O (g)} \xrightarrow{\text{Catalyst Y}} \text{CO}_2 (g) + \text{H}_2 (g) \]

This reaction converts carbon monoxide and steam into carbon dioxide (CO₂) and additional hydrogen gas (H₂).

**Hint:** Recognize the role of the catalyst in facilitating the reaction without being consumed.

### Step 3: Identifying the Catalyst 'Y'
The catalyst 'Y' used in this reaction is crucial for the conversion of CO and steam into CO₂ and H₂. Common catalysts for this reaction include:
- Iron chromite (FeCrO₄)
- Iron oxide (Fe₂O₃)
- A combination of iron oxide and chromium oxide (Fe₂O₃ + Cr₂O₃)
- Thorium oxide (ThO₂) can also be used as an alternative to chromium oxide.

**Hint:** Recall the common catalysts used in the water-gas shift reaction.

### Conclusion
Based on the above steps, the catalyst 'Y' in this reaction can be identified as either iron chromite (FeCrO₄) or a combination of iron oxide and chromium oxide (Fe₂O₃ + Cr₂O₃).

### Final Answer
The catalyst 'Y' is **FeCrO₄ (Iron Chromite)** or **Fe₂O₃ + Cr₂O₃ (Iron and Chromium Oxides)**.