2022 · Q24
Which one of the following statements about biogas is not correct?
General KnowledgeChemistry
- AIt is mainly composed of methane gas
- Bit is non-renewable source of energy
- CIt is formed by the decomposition of cow dung in the absence of oxygen
- DIt burns without smoke and leaves no residue
Explanation
Biogas is 55–65% methane, produced by anaerobic decomposition of cow dung, and burns without smoke or residue. It is a RENEWABLE source (made from biomass), so describing it as non-renewable is the incorrect statement.