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Q.

Biogas is a mixture of:


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a

Oxygen, carbon dioxide, methane

b

Nitrogen, oxygen

c

Methane, nitrogen, hydrogen

d

None of these 

answer is A.

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Detailed Solution

Concept- Biogas is a mixture of gases liberated by the breakdown of organic matter in absence of oxygen.
Biogas is also sometimes called swamp gas, sewer gas, compost gas, and marsh gas. Biogas is a naturally occurring and renewable energy source produced by the decomposition of organic matter by certain bacteria under anaerobic conditions.
It is a mixture of 50-75 % methane (Question Image), 25-50 % carbon dioxide (Question Image) and trace amounts of gases like nitrogen, hydrogen and oxygen.
Therefore, the main constituent of biogas is methane followed by carbon dioxide.
Hence, the correct answer is 1.
 
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