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