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DDT is prepared by reacting chlorobenzene with 

(a) CCl4 

(b) CCI3.CHO 

(c) CHCl3 

(d) ethane

1 Answer

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Best answer

(b) CCI3.CHO 

DDT, prepared by the reaction of chloral (CCl3​CHO) with chlorobenzene in the presence of sulfuric acid, was first made in 1874; its insecticidal properties were discovered in 1939 by a Swiss chemist, Paul Hermann Muller.

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