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

Options

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

Explanation

To solve the question, we need to identify the compound 'X' formed when red hot coke reacts with steam at a temperature of 1000°C. Here’s the step-by-step solution:

### Step 1: Understand the Reaction
The reaction involves red hot coke (carbon, C) and steam (H2O) at a high temperature (1000°C). This is a known reaction in chemistry.

### Step 2: Write the Reaction Equation
The reaction can be represented as:
\[ \text{C (s)} + \text{H}_2\text{O (g)} \rightarrow \text{CO (g)} + \text{H}_2\text{(g)} \]
This reaction produces carbon monoxide (CO) and hydrogen gas (H2).

### Step 3: Identify 'X'
The products of this reaction, CO and H2, are collectively known as "water gas." Therefore, 'X' is water gas, which can be represented as:
\[ X = \text{CO (g)} + \text{H}_2\text{(g)} \]

### Step 4: Further Reaction of 'X'
Next, 'X' (water gas) undergoes another reaction at a lower temperature (500°C) in the presence of a catalyst (Y). The reaction can be written as:
\[ \text{CO (g)} + \text{H}_2\text{O (g)} \xrightarrow{Y} \text{CO}_2\text{(g)} + 2\text{H}_2\text{(g)} \]
Here, the catalyst Y can be a mixture of iron(III) oxide (Fe2O3) and chromium(III) oxide (Cr2O3).

### Step 5: Identify 'Z'
In this reaction, the products are carbon dioxide (CO2) and hydrogen gas (H2). Thus, 'Z' is CO2.

### Final Answer
Therefore, the compound 'X' is water gas, which consists of carbon monoxide and hydrogen gas.