Question

The pesticide most persistent in the soil is
(A) DDT
(B) BHC
(C) Dieldrin
(D) baygon

Answer 1

Hint:Pesticides are chemical substances that are used to kill insects that destroy food crops, but such pesticides and insecticides are harmful to nature in a very broad way, they affect soil, water and maybe air as well.
Step by step solution Pesticides are chemicals that are applied to kill or repel pests. Organochlorines, organophosphates, carbamates, pyrethroids, or triazines are some forms. Dieldrin is one of the most persistent organochlorines in soil. Above all, dieldrin is five times more hazardous than DDT.
Organochlorine pesticides are the most persistent pesticides in the environment because each molecule contains more than five chlorine atoms, making the degradation process very slow. Organochlorine pesticides are chlorinated hydrocarbons that are widely used in agriculture and mosquito control.
Pesticides in the organophosphate and carbamate groups are the least persistent in the environment.They degrade quickly and do not persist in the environment in the surroundings. Baygon belongs to the carbamate family. Organochlorines are of three types. DDT belongs to first type of organochlorine. BHC also belongs to one of the type organochlorine.
So, option (C) is correct.
Note: Pesticides have the potential to pollute lawn, water, and other vegetation. Pesticides can be poisonous to a variety of different organisms in addition to insects and weeds, such as birds, fish, helpful insects, and non-target plants.