A) Methane
B) Carbon monoxide
C) Carbon dioxide
D) Formed by fermentation
Correct Answer: B
Solution :
Biogas is methane rich fuel gas produced through anaerobic breakdown and fermentation of biomass. It contains\[C{{H}_{4}}\],\[C{{O}_{2}}\] and trace of\[{{H}_{2}}\],\[{{H}_{2}}S\] and\[{{N}_{2}}\], whereas producer gas mainly contains\[CO\], \[{{H}_{2}}\]and \[{{N}_{2}}\].
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