The catalyst used in the manufacture of sulphuric acid is by contact process ______________.

• A. Al₂O₃
• B. V₂O₅
• C. Cr₂O₃
• D. MnO₂

The catalyst used in the manufacture of sulfuric acid by the contact process is V₂O₅, which stands for vanadium pentoxide. This compound plays a crucial role in facilitating the reaction between sulfur dioxide and oxygen to produce sulfur trioxide, a key step in sulfuric acid production.

Key Points about the Contact Process

• The contact process is an industrial method for producing sulfuric acid.
• Vanadium pentoxide (V₂O₅) is essential for increasing the reaction rate.
• The overall reaction involves sulfur dioxide (SO₂) reacting with oxygen (O₂).

Why V₂O₅ is Effective

V₂O₅ is effective because it lowers the activation energy needed for the reaction, allowing it to occur at lower temperatures and improving efficiency.