Contact Process
In the Contact process for sulfuric acid manufacture, oxidation of SO2 to SO3 is typically carried out using:
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About This Question
- Subject
- chemistry
- Chapter
- p-block elements
- Topic
- contact process
- Difficulty
- Hard
- Year
- 2025
Solution
Correct Answer:
V2O5 catalyst near 723 K and about 1-2 atm
The equilibrium 2SO2 + O2 <=> 2SO3 is exothermic, so very high temperature lowers SO3 yield, while too low temperature slows the rate. Industrially, V2O5 is used as catalyst around 723 K with low pressure (about 1-2 atm) to balance rate and equilibrium conversion. This condition gives high efficiency in the Contact process.
This hard difficulty chemistry question is from the chapter p-block elements, covering the topic of contact process. It appeared in the 2025 exam.
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