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Which one of the following insecticides is more stable in the environment?

1. DDT
2. Diazinon
3. Camphechlor
4. Malathion

Correct answer: DDT

Solution

DDT is highly chlorinated and very resistant to environmental degradation, so it persists much longer than organophosphates like diazinon and malathion. Camphechlor is also persistent, but DDT is the classic example of the most stable among these options.

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