Statement $X$: Biogas is used as a fuel for energy.
Statement $Y$: Biogas contains $H_2S$,$CO_2$,and oxygen gas.

Which gas is primarily produced in biogas plants?

Which gases are present in biogas?
$(i)$ Methane
$(ii)$ Hydrogen sulfide
$(iii)$ Carbon dioxide
$(iv)$ Carbon monoxide
$(v)$ Butane
$(vi)$ Ethane

Study the following flow chart of biogas production and select the correct option for $A, B$ and $C$.
Stage $III$: $C$
Stage $II$: Organic acids $\xrightarrow{B}$ $C$
Stage $I$: Soluble compounds or monomers $\xrightarrow{A}$ Organic acids
(Note: The flow chart shows: Proteins,Fats,Cellulose,Hemicellulose $\rightarrow$ Soluble compounds or monomers $\xrightarrow{A}$ Organic acids $\xrightarrow{B}$ $C$)

During the anaerobic digestion of organic waste for the production of biogas,which of the following remains undegraded?

Biogas is a mixture of gases produced by the activity of microbes. The type of gas produced depends on: