Among the following, which one is chlorine containing insecticide?

Options

A. D.D.T.
B. Freon
C. Phosgene
D. Iodoform

Answer

To solve the question of which among the given options is a chlorine-containing insecticide, we will analyze each option provided.

### Step-by-Step Solution:

1. **Identify the Options**:
We need to consider the given options, which are DDT, Freon, Phosgene, and Iodoform.

2. **Analyze DDT**:
- DDT stands for Dichloro-Diphenyl-Trichloroethane.
- The chemical structure of DDT contains chlorine atoms.
- It is widely known and used as an insecticide.

**Conclusion**: DDT is a chlorine-containing insecticide.

3. **Analyze Freon**:
- Freon is a name for a group of chemicals, with one common type being CF2Cl2.
- While it contains chlorine, Freon is primarily used as a refrigerant and in air conditioning systems, not as an insecticide.

**Conclusion**: Freon is not an insecticide.

4. **Analyze Phosgene**:
- Phosgene has the chemical formula COCl2.
- It is used in the production of pesticides but is not directly used as an insecticide itself.

**Conclusion**: Phosgene is not an insecticide.

5. **Analyze Iodoform**:
- Iodoform has the formula CHI3.
- It does not contain chlorine; instead, it contains iodine.
- Iodoform is used as an antiseptic.

**Conclusion**: Iodoform is not an insecticide.

6. **Final Conclusion**:
- After analyzing all the options, the only chlorine-containing insecticide is DDT.

### Answer:
**DDT** is the chlorine-containing insecticide.