In the contact process of manufacturing of `H_(2) SO_(4)` the catalyst used is

Options

A. `P_(2) O_(6)`
B. `V_(2) O_(5)`
C. `Rh`
D. NO

Answer

To answer the question regarding the catalyst used in the contact process for the manufacturing of sulfuric acid (H₂SO₄), we can break it down into the following steps:

### Step-by-Step Solution:

1. **Understanding the Contact Process**:
The contact process is a method used to produce sulfuric acid by oxidizing sulfur dioxide (SO₂) to sulfur trioxide (SO₃).

2. **Initial Reaction**:
The first step involves the reaction of sulfur (S) with oxygen (O₂) to produce sulfur dioxide (SO₂):
\[ S + O_2 \rightarrow 2 SO_2 \]

3. **Conversion of SO₂ to SO₃**:
The next step is the conversion of sulfur dioxide (SO₂) into sulfur trioxide (SO₃). This reaction is crucial and requires a catalyst:
\[ 2 SO_2 + O_2 \xrightarrow{\text{catalyst}} 2 SO_3 \]

4. **Identifying the Catalyst**:
The catalyst used in this reaction is Vanadium(V) oxide, which is represented as V₂O₅. This catalyst helps to speed up the reaction without being consumed in the process.

5. **Reaction Conditions**:
The reaction typically occurs at high temperatures (around 400 to 450 degrees Celsius) and pressures (1 to 2 atm) to optimize the yield of SO₃.

6. **Final Steps in the Contact Process**:
After producing sulfur trioxide (SO₃), it is then reacted with existing sulfuric acid (H₂SO₄) to produce oleum (H₂S₂O₇), which can then be mixed with water to produce sulfuric acid (H₂SO₄):
\[ SO_3 + H_2SO_4 \rightarrow H_2S_2O_7 \]
\[ H_2S_2O_7 + H_2O \rightarrow 2 H_2SO_4 \]

### Conclusion:
Thus, the catalyst used in the contact process for the manufacture of sulfuric acid (H₂SO₄) is **Vanadium(V) oxide (V₂O₅)**.

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