H2S present in gaseous stream can be removed by adsorption on _____________________?
Correct answer: C. Bog iron
- A. Silica gel
- B. Active carbon
- C. Bog iron
- D. Limestone powder
Explanation
Bog iron, containing hydrated iron oxides, removes hydrogen sulfide by reacting with or fixing sulfide on the iron-bearing material. Silica gel and activated carbon can adsorb gases, but bog iron is the standard specific medium for H₂S removal here.
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