Percentage of para-para isomer in DDT is ?: (A) 20-30%, (B) 40-50%, (C) 60-70%, (D) 70-80%
Answer is D. Ans. is 'd' i.e., 70-80% o DDT is an amorphous white powder. o Para-para isomer is the most active fraction ---> contains 70-80% of para-para isomers.