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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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