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प्रश्न
Biogas is mainly ______.
पर्याय
O2
CO2
N2
CH4
MCQ
रिकाम्या जागा भरा
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उत्तर
Biogas is mainly CH4.
Explanation:
Biogas also contains carbon dioxide and small amounts of other gases, but oxygen, carbon dioxide and nitrogen are not its main component.
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