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    Question

    Which of the following gas present in the

    biogas has composition value 0-1 %?
    A CO2 Correct Answer Incorrect Answer
    B N2 Correct Answer Incorrect Answer
    C H2 Correct Answer Incorrect Answer
    D O2 Correct Answer Incorrect Answer

    Solution

    Typical composition of biogas

    Compound

    Formula

    Percentage by volume

    Methane

    CH 4

    50–80

    Carbon dioxide

    CO 2

    15–50

    Nitrogen

    N 2

    0–10

    Hydrogen

    H 2

    0–1

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