Choose the correct statement:DDT an insecticide is considered as:
Correct answer: D. Very stable molecule having a half-life of 10 to 15 years
- A. Very unstable molecule having a half-life of 1⁄2 to 1 year
- B. Unstable molecule having a half-life of 2 to 5 years
- C. Stable molecule having a half-life of 5 to 8 years
- D. Very stable molecule having a half-life of 10 to 15 years
Explanation
The correct answer is Option D: 'Very stable molecule having a half-life of 10 to 15 years.' DDT (Dichlorodiphenyltrichloroethane) is a highly stable pesticide with a long environmental half-life, often cited between 2 and 15 years. This persistence is a significant reason for its controversial use and eventual ban in many countries due to environmental and health concerns. The other options underestimate DDT's stability and half-life, making them incorrect.
This question appeared on the ETEA MDCAT 2016 paper, which you can sit online with every answer explained.
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