The group of chemicals used as pesticide is:
- A
Sodium chlorate, DDT, PAN
- B
DDT, Aldrin
- C
Aldrin, Sodium chlorate, Sodium arsenite
- D
Dieldrin, Sodium arsenite, Tetrachlorothene
MCQEasyJEE 2023Environmental Effects (DDT, Freons)
JEE Chemistry 2023 Question with Solution
Answer
Correct answer:B
Step-by-step solution
Standard Method
Given: A list of groups of chemicals is provided.
Find: Which group is used as pesticide.
From the solution:
- DDT and Aldrin are well-known pesticides.
- PAN is a component of photochemical smog.
- Sodium chlorate is a herbicide and defoliant.
- Sodium arsenite has been used as an insecticide and rodenticide.
- Tetrachloroethene is used in dry cleaning.
Comparing these statements with the options, the solution content itself concludes that the correct group is DDT and Aldrin.
Therefore, based on the solution, the correct option is B. However, the provided correct answer field marks C.
Conflict in extracted source
Given: The correct answer field says C.
Find: Whether the extracted explanation supports that answer.
Option C contains Aldrin, Sodium chlorate, Sodium arsenite.
But the extracted explanation states:
- Sodium chlorate is a herbicide and defoliant.
- Sodium arsenite has been used as an insecticide and rodenticide.
- The conclusion explicitly says DDT and Aldrin.
So the source material is internally inconsistent: the answer key says C, while the written explanation supports B.
Common mistakes
Treating PAN as a pesticide is incorrect because the solution identifies it as a component of photochemical smog. Use the classification given in the explanation instead of guessing from unfamiliar abbreviations.
Assuming every toxic chemical is a pesticide is incorrect. The solution distinguishes pesticide, herbicide, defoliant, rodenticide, and dry-cleaning solvent, so each substance must be classified by its stated use.
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