Question

In the contact process of manufacturing \(\text{H}_2\text{SO}_4\), the arsenic purifier used in the industrial plant contains:

• A. \(\text{Al}_2\text{O}_3 \cdot x\text{H}_2\text{O}\)
• B. \(\text{Fe}_2\text{O}_3 \cdot x\text{H}_2\text{O}\)
• C. \(\text{Cr}_2\text{O}_3 \cdot x\text{H}_2\text{O}\)
• D. \(\text{Fe}_2\text{O}_3 \cdot x\text{H}_2\text{O}\)

Hint:

Arsenic impurities in the sulfur dioxide feed are removed using hydrated iron oxide in the contact process. - Ferric oxide acts as an adsorbent for arsenic compounds, preventing catalyst poisoning in the reaction.

Answer 1

The Correct Option is D

Step 1: Role of Arsenic Purifiers in the Contact Process - The contact process for producing \(\text{H}_2\text{SO}_4\) requires removing impurities such as arsenic from sulfur dioxide (\(\text{SO}_2\)). - \(\text{Fe}_2\text{O}_3\) (ferric oxide) in hydrated form (\(\text{Fe}_2\text{O}_3 \cdot x\text{H}_2\text{O}\)) is used to absorb and purify arsenic. Hence, the correct answer is \(\text{Fe}_2\text{O}_3 \cdot x\text{H}_2\text{O}\).