Q8 of 269 Page 148

Name the clean fuel which can be obtained from cow-dung.

Biogas is the cleanest fuel that can be obtained from cow-dung. It typically refers to a mixture of different gases produced by the breakdown of organic matter in the absence of oxygen.


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6

Name the constituents of biogas.

 7

Which of the following is needed for the formation of biogas from cow-dung and which not?

Water, Oxygen

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Apart from cattle dung, what other substances can be added to a biogas plant?

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Name any three forms of energy which could be harnessed from the sea.