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DDT undergoes a slow transformation to which of the following products?

1. CCl3-CHO and chlorobenzene
2. p,p'-Dichlorodiphenylethylene
3. p,p'-Dichlorodiphenyldichloroethane
4. p,p'-Dichlorodiphenylchloroethane

Correct answer: p,p'-Dichlorodiphenylethylene

Solution

DDT slowly eliminates HCl (dehydrohalogenation) to form DDE, p,p'-dichlorodiphenyldichloroethylene (p,p'-dichlorodiphenylethylene). This persistent metabolite is what accumulates in the environment.

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