Which of the following pesticide/insecticide does not contain a chlorine atom in its structure?

Correct option is C

1. Methoxychlor (a):
· A chlorinated hydrocarbon pesticide.
· Contains chlorine atoms in its molecular structure.
2. Mirex (b):
· A highly chlorinated insecticide.
· Contains multiple chlorine atoms in its structure.
3. Malathion (c):
· An organophosphate insecticide.
· Does not contain chlorine in its structure; its primary active groups are based on phosphorus, sulfur, and oxygen.
4. Endosulfan (d):
· A chlorinated insecticide.
· Contains chlorine atoms in its structure.
Information Booster: 1. Chlorinated Hydrocarbons:
· Include pesticides like Methoxychlor, DDT, Mirex, and Endosulfan.
· Known for their persistence in the environment and potential to bioaccumulate.
2. Organophosphate Pesticides:
· Include Malathion and Parathion.
· Work by inhibiting acetylcholinesterase, an enzyme critical for nerve function.
3. Environmental Concerns:
· Chlorinated pesticides are more persistent and pose greater long-term risks to ecosystems.
· Organophosphates are less persistent but can be acutely toxic.
Key Points: 1. Malathion does not contain chlorine and belongs to the organophosphate class of pesticides.
2. Chlorinated hydrocarbons like Methoxychlor, Mirex, and Endosulfan contain chlorine and are environmentally persistent.
3. Understanding pesticide chemistry helps in assessing their environmental impact and toxicity.