Some Basic Principles of Organic Chemistry: Chemistry | JEE Main
The group of chemicals used as pesticide is
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Hint 1 of 2
Which category of chemical agents do DDT and Aldrin fall into?
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Correct answer
DDT and Aldrin are both classic organochlorine compounds used specifically as pesticides.
Option analysis
Why each option works or fails
A · Sodium chlorate, DDT, PAN
Believing that PAN (peroxyacetyl nitrate) is an agricultural chemical rather than a secondary air pollutant found in photochemical smog. Identify PAN as a secondary photochemical pollutant and sodium chlorate as an herbicide, ruling out this group as an exclusive list of pesticides/insecticides.
B · Aldrin, Sodium chlorate, Sodium arsinite
Confusing inorganic herbicides and toxic salts like sodium chlorate and sodium arsenite with standard target pesticides. Recognize that sodium chlorate acts primarily as an herbicide and sodium arsenite is an inorganic weedicide/herbicide, whereas the prompt seeks the pair recognized standardly as pesticides.
C · DDT, Aldrin
None. This option correctly pairs two synthetic organochlorine pesticides. DDT (dichlorodiphenyltrichloroethane) and Aldrin are chlorinated hydrocarbons widely manufactured and applied as synthetic insecticides/pesticides.
D · Dieldrin, Sodium arsinite, Tetrachloroethene
Treating industrial dry-cleaning solvents like tetrachloroethene as agricultural pesticides. Identify tetrachloroethene as an industrial solvent used in dry cleaning, not an agricultural chemical.
Reviewed route
Solution
StepWorking
✓quick_kill
Pesticides primarily belong to organochlorines (e.g., DDT, BHC, Aldrin, Dieldrin), organophosphates (e.g., Malathion), and carbamates.
Hints that build this answer step by step
Which category of chemical agents do DDT and Aldrin fall into?
Organochlorine pesticides (insecticides)
Why cannot the option containing 'Tetrachloroethene' or 'PAN' be correct?
Tetrachloroethene is a dry-cleaning solvent and PAN is a smog component, so they are not agricultural pesticides.