Question

Which of the following is a biodegradable pollutant?
A.Domestic waste.
B.DDT
C.Mercury salts
D.Aluminium foil

Answer 1

Hint: Try to recall that biodegradable pollutants are those materials which can be decomposed by bacteria or other natural organisms and not adding to pollution. Now, by using this you can easily find the correct option from the given ones.

Complete step by step solution:
It is known to you that biodegradable pollutants are materials that can be decomposed by bacteria or other natural organisms whereas non-biodegradable pollutants are those materials which cannot be broken down by natural organisms and act as a source of pollution.
Now, in question you can easily find the biodegradable pollutants by inspecting each of the given option:

Option A, Domestic waste: Domestic waste includes kitchen wastes like vegetable and fruit peels, used tea leaves, paper clothes, etc. which can be easily broken down by action of bacteria or decomposers. So, option A is the correct option.

Option B: DDT: DDT stands for Dichlorodiphenyltrichloroethane. It is a toxic compound and is highly polluting substance as it is non-biodegradable. So, option C is not the correct option.

Option C: Since, mercury is an element so it is non-biodegradable and cannot be decomposed by bacteria. So, option C is also not correct.

Option D: Aluminium foil: It is also not biodegradable nor disintegrates by degradation in a landfill over a long period of time. So, option D is also not correct.
Therefore, from above we can conclude that option A is the correct option to the given question.

Note:
It should be remembered to you that DDT is an organochlorine. It was used in the Second World War. It was used against insects in large amounts but after having it used an enormous lot of it, people realized it might not be healthy and today you know that it is a carcinogen.