The decomposition of sludge by anaerobic bacteria in sewage-treatment processes produces marsh gas (methane).
Which of the following is mainly produced by the activity of anaerobic bacteria on sewage?
NEET UG 2011 — Zoology Microbes in Human Welfare
2011mcqmedium
Which of the following is mainly produced by the activity of anaerobic bacteria on sewage?
Official previous-year question
Held on 30 Apr 2011 · Verified 9 Jul 2026.
Options
- A
Propane
- B
Mustard gas
- C
Marsh gas
- D
Laughing gas
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