Question

Biogas is a mixture of:
(A) $\text{S}{{\text{O}}_{\text{2}}}\text{+}{{\text{H}}_{\text{2}}}\text{S}$
(B) ${{\text{O}}_{\text{2}}}\text{+C}{{\text{O}}_{\text{2}}}\text{+}{{\text{O}}_{\text{3}}}$
(C) $\text{C}{{\text{O}}_{\text{2}}}\text{+C}{{\text{H}}_{\text{4}}}\text{+}{{\text{N}}_{\text{2}}}\text{+}{{\text{H}}_{\text{2}}}\text{S}$
(D) $\text{N}{{\text{O}}_{\text{2}}}\text{+}{{\text{H}}_{\text{2}}}\text{+C}{{\text{O}}_{\text{2}}}$

Answer 1

Biogas is primarily a mixture of methane and carbon dioxide with smaller amounts of other gases as well. This gas originates from the bacteria during the anaerobic degradation processes.

Complete step by step solution:
Biogas is a mixture of gases that is formed due to the breakdown of the organic matter in the absence of air or under anaerobic conditions. It mainly consists of methane and carbon dioxide and has traces of hydrogen sulphide, hydrogen and carbon monoxide. It can be produced from raw materials such as agricultural waste, plant waste, manure, municipal waste, sewage, etc. biogas is now used as a renewable source of energy. Also known by the name of “gobar gas” in India.
So, the correct answer here is option C, carbon dioxide, methane, nitrogen, and hydrogen sulphide.

Note:
The gases present in the biogas can be combusted with oxygen and the energy released in this process is used in different purposes such as for cooking. This allows biogas to be used as a fuel. Biogas can be compressed after the removal of the carbon dioxide just like the compressed natural gas and used to power motor vehicles.
Though there are many useful attributes of biogas, there are some harmful as well. The toxic hydrogen sulphide and carbon monoxide present in the biogas can prove to be fatal if inhaled in large quantities. Leads of methane is another risk that is associated due to the problem of methane being combustible as well as a green-house gas.