alleryBiogas is mainly a mixture of methane and which other gas?
AOxygen gas
BHelium gas
CCarbon dioxide
DArgon gas
Answer & Solution
Correct answer: C. Carbon dioxide
1. Biogas forms when organic matter breaks down without oxygen.
2. It is primarily methane (CH4) and carbon dioxide (CO2).
3. Small amounts of hydrogen sulphide may be present.
_Source: Wikipedia, Renewable resource, Biogas_
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