Question

Arrange the following statements in the proper sequence of their occurrence during the contact process.

1. Dilution of oleum $H_2{S}_2{O}_7$

2. Absorption of sulphur trioxide $S{O}_3$

3. Production of sulphur dioxide $S{O}_2$

4. Oxidation of sulphur dioxide $S{O}_2$

• A. 3 → 2 → 4 → 1
• B. 3 → 4 → 2 → 1
• C. 2 → 4 → 3 → 1
• D. 4 → 3 → 2 → 1

Answer 1

The correct option is B

3 → 4 → 2 → 1

The occurrence sequence of steps in the contact process is as follows:
3→Production of sulphur dioxide
4→Oxidation of sulphur dioxide
2→Absorption of sulphur trioxide
3→Dilution of oleum