What happens, when SO2 is passed through a solution of H2S in water ?
Correct answer: A. Precipitation of sulphur takes place
- A. Precipitation of sulphur takes place
- B. H2SO3 is formed
- C. Oleum is formed
- D. None of these
Explanation
Sulphur dioxide and hydrogen sulphide undergo a redox reaction: 2H2S + SO2 → 3S + 2H2O. Elemental sulphur consequently precipitates from the solution.
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