Direction for: In each of the following questions a statement of Assertion is given followed by a corresponding statement of Reason just below it. Of the statements mark the correct answer as
Assertion Organochlorine pesticides are organic compounds that have been chlorinated. Reason Fenitrothion is one of the organochlorine pesticides.A) extinction of these species from other regions
B) continental separation
C) absence of terrestrial route to these places
D) retrogressive evolution
Correct Answer: C
Solution :
Pesticides are the substances used to kill or repel pests. On the basis of chemical structure, major pesticides are grouped under five categories; (i) organochlorines (ii) organo- phosphates (iii) carbamates (iv) pyrethroids (v) triazines. Organochlorines are basically organic compounds that have been chlorinated and have very low bio-degradation and get accumulated in environment and possess serious problems. DDT, BHC, Aldrin and Endosulphan are the examples of organochlorines. Fenitrothion is an example of organophosphate.
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