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Fertilisers and Pesticides

The interior ...

Question

The interior of a cow-dung pile kept for a few days is quite warm. This is mostly because

A

cellulose present in cow dung is a good insulator

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B

bacterial metabolism inside the dung releases heat

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C

undigested material released heat due to oxidation by air

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D

dung is dark and absorbs a lot of heat

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Solution

The correct option is B
bacterial metabolism inside the dung releases heat

Bacterial metabolism inside the dung releases heat

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Similar questions

Q. The interior of a cow-dung pile kept for a few days is quite warm. This is mostly because:

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)
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Q. Cow dung cake is a nutritious food for crops.

Q. Biogas is produced by the decomposition of cow dung by the methanogens present in it.

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Fertilisers and Pesticides

Standard XII Biology

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