The expanded form of DDT is

1. dichloro diphenyl trichloroethane

2. dichloro diethyl trichloroethane

3. dichloro dipyridyl trichloroethane

4. dichloro diphenyl tetrachloroacetate

Ans. (a) The expanded form of DDT is dichloro diphenyl trichloroethane.

It is an insecticide that was first synthesized in 1874. in insects it opens the sodium ion channels in neurons which leads to spas on and eventual death DDT, BHC is an organic compound which was effectively used against pest during 1970 and 1980. But, now these are banned due to their less or no degradation.

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