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Which gas mixture forms biogas during anaerobic sludge digestion?
AAmmonia, chlorine, argon
BMethane, H2S and CO2
COxygen, nitrogen, argon
DEthane, neon, oxygen
Answer & Solution
Correct answer: B. Methane, H2S and CO2
Anaerobic bacteria release methane, hydrogen sulphide and carbon dioxide, which is inflammable and a source of energy.
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