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Question
Pick out the wrong statement.
Options:
A .  DDT is manufactured by the condensation of chlorobenzene with chloral at 30°C in presence of oleum, which is a highly exothermic reaction.
B .  Chloral is obtained by the chlorination of ethyl alcohol.
C .  Insecticides acting on the insects through the respiratory system are called fumigants.
D .  Benzene hexachloride is not a contact insecticide.
Answer: Option D
Answer: (d).Benzene hexachloride is not a contact insecticide.
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