Biogas is composed mainly of ________ and carbondioxide.
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A.
Ethane
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B.
Chlorine
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C.
Methyl Isocyanate
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D.
Methane
Correct Answer:
D. Methane
Explanation:
Biogas is a renewable energy source produced through the anaerobic digestion of organic matter by bacteria in an oxygen-free environment. Its chemical composition consists primarily of methane (typically 50–75%) and carbon dioxide (25–50%), along with trace amounts of other gases such as hydrogen sulfide, nitrogen, and water vapor. Methane is the combustible component that allows biogas to be used as a fuel for heating, electricity generation, or as a vehicle fuel when processed into biomethane.
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