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Question

Which of the following is biodegradable?


A

(a) DDT

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B

(b) Cow dung

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C

(c) Polythene

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D

(d) Plastic

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Solution

The correct option is B

(b) Cow dung


The correct option is B:

Explanation of the correct options

  1. Biodegradable waste is organic waste that is broken down into simple organic and inorganic compounds by the action of decomposers (certain bacteria and fungi).
  2. They are cycled in the environment in separate biogeochemical cycles.
  3. Cow dung is biodegradable waste that can be decomposed by the decomposers.

Explanation of the incorrect options

Option A

DDT is a non-biodegradable substance that cannot be decomposed by microorganisms and can cause harmful effects on the environment.

Option C

Polythene is a type of plastic and is not biodegradable waste.

Option D

Plastic is a non-biodegradable waste.

Final answer: Cow dung is biodegradable.


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