Q172 / 180 · NEET 2014 · Zoology

What gases are produced in anaerobic sludge digesters?

  • A
    Methane and CO2
  • Correct answer
    B
    Methane, hydrogen sulphide and CO2
  • C
    Methane, hydrogen sulphide and CO.
  • D
    Hydrogen sulphide and CO2

Solution

Biogas is a mixture of gases (containing predominantly methane) produced by microbial activity and which may be used as fuel. The major component of biogas is methane (50-70%) which is highly inflammable other gases are carbon dioxide (30-40%) and a mixture of other gases H2, H2S etc. (10%). 

Hence, the correct answer is option: 'B'.

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