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Biogas Plant

Which of the ...

Question

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

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Solution

Water is needed and oxygen is not.
Biogas is formed by the anaerobic degradation of cow dung in the presence of water but in the absence of oxygen.

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Q. Which of the following is needed for the formation of biogas from cow-dung and which not ? Water, Oxygen

One of the following is not required in the formation of biogas in a biogas plant. This is :
(a) cow-dung (b) water (c) oxygen (d) anaerobic bacteria

Q. Mention any two ways in which cow dung can be utilised as a fuel. Out of two which is better? Justify. (2 marks)
Ans. Cow dung can be used by burning cowdung itself or by burning biogas produced from it. Biogas is more efficient as it's thermal efficiency is higher than that of cow dung. It doesnt contain moisture while cow dung has a lot.
(I got only 1 out of 2 marks)
What should I add?

In a biogas plant, the cow dung and water are mixed in equal proportion to prepare:

Q. Read the following statements and choose the correct option:
Assertion: Biogas plants are mostly situated in rural areas.
Reason: Biogas is produced by the action of aerobic decomposers on a slurry of cow dung and water.

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