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Q:

Which of the following statements about bio-gas is INCORRECT?

  • 1
    Biogas contains less than 1% methane.
  • 2
    Bio-gas burns without smoke and leaves no residue.
  • 3
    Bio-gas is also known as ‘gobar-gas’.
  • 4
    Plant parts, vegetable waste and sewage produce biogas.
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Answer : 1. "Biogas contains less than 1% methane."
Explanation :

Biogas is a renewable fuel produced from the anaerobic digestion of organic feedstocks including municipal waste, farm waste, food waste, and energy crops. Raw biogas typically consists of methane (50–75%), carbon dioxide (25–50%), and smaller amounts of nitrogen (2–8%).

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