The pesticide DDT slowly changes to

Options

A. `C Cl_(3)-CHO` and chlorobenzene
B. `p,p'-`Dichlorodiphenylethene
C. `p,p'-`Dichlorodiphenyldichloroethane
D. `p,p'`Dichlorodiphenydichloroethene

Answer

### Step-by-Step Solution:

1. **Identify DDT**:
- DDT stands for Dichloro-Diphenyl-Trichloroethane, a synthetic pesticide that was widely used for agricultural purposes.

2. **Understand the Structure of DDT**:
- The chemical structure of DDT includes two phenyl rings (benzene rings) and a trichloroethane group. The formula can be represented as C14H9Cl5.

3. **Recognize the Environmental Impact**:
- Due to its persistence in the environment and potential harmful effects on wildlife and humans, the use of DDT has been restricted or banned in many countries.

4. **Know the Transformation of DDT**:
- DDT undergoes slow degradation in the environment, leading to the formation of various metabolites. One of the primary breakdown products is Dichloro-Diphenyl-Dichloroethylene (DDE).

5. **Chemical Structure of DDE**:
- The chemical structure of DDE can be represented as C12H8Cl4, which has two phenyl rings and two chlorine atoms on each ring, along with a double bond between the carbon atoms.

6. **Conclusion**:
- Therefore, the pesticide DDT slowly changes to Dichloro-Diphenyl-Dichloroethylene (DDE).

### Final Answer:
The pesticide DDT slowly changes to Dichloro-Diphenyl-Dichloroethylene (DDE).

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