Correct option is D
The correct answer is
(4) C and D only. Among the given options,
Isopropyl N-Phenyl Carbonate (IPC) and
Parathion are
not chlorine-based pesticides. The others – γ-lindane, Dieldrin, and 2,4,5-T – all contain chlorine as part of their molecular structure.
Analysis of Each Option:
·
(a) γ-lindane:
· Also known as
Hexachlorocyclohexane (HCH), it is a
chlorinated insecticide.
·
(b) Dieldrin:
· An organochlorine insecticide derived from
Aldrin, it contains chlorine.
·
(c) Isopropyl N-Phenyl Carbonate (IPC):
· A
carbamate herbicide that
does not contain chlorine.
·
(d) Parathion:
· An organophosphate insecticide containing
phosphorus but
no chlorine.
·
(E) 2,4,5-T (Trichlorophenoxyacetic Acid):
· A
chlorinated herbicide used historically in agriculture and as a component of Agent Orange.
Information Booster:
1.
Chlorine-Based Pesticides:
· Include compounds like DDT, Lindane, and Dieldrin. They persist in the environment and are known for bioaccumulation.
2.
Organochlorines:
· These pesticides are highly effective but harmful due to their toxicity and persistence in the ecosystem.
3.
Carbamates:
· Pesticides like IPC belong to this class, which inhibits acetylcholinesterase but doesn’t contain chlorine.
4.
Organophosphates:
· Parathion is a highly toxic organophosphate insecticide that works by inhibiting acetylcholinesterase.
Additional Knowledge:
1.
γ-lindane:
· A widely used chlorinated insecticide, now banned in many countries due to its toxicity.
2.
Dieldrin:
· A potent chlorinated insecticide used in agriculture; phased out due to environmental impact.
3.
Isopropyl N-Phenyl Carbonate (IPC):
· Used as a selective herbicide for grass control in cereal crops.
4.
Parathion:
· Introduced in 1947, banned or restricted in many countries due to its acute toxicity.
5.
2,4,5-T:
· Used extensively in agriculture and forestry but discontinued due to contamination with dioxins.
English
10 Questions
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