Q27 of 269 Page 149

What is biogas? Name the major component of biogas.

Biogas typically refers to a mixture of different gases produced by the breakdown of organic matter in the absence of oxygen. Methane is the major component of biogas constituting about 60%.


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25

Suggest a safe and efficient method for the disposal of bio wastes and sewage materials. How is this method advantageous to us?

 26

Which of the following sources of energy are not derived from the sun?

Biomass, Wind, Ocean thermal energy, Geothermal energy, Nuclear fuels, Hydroelectricity, Wave energy, Coal, Petroleum, Tidal energy

 27

What are the raw materials used for making biogas?

 27

Describe the construction and working of a biogas plant with the help of a labelled diagram.