Which component of CFC attack ozone ?

Options

A. Chlorine
B. Flourine
C. Carbon mono-oxide
D. Hydrogen

Answer

### Step-by-Step Solution:

1. **Understanding CFCs**: Chlorofluorocarbons (CFCs) are chemical compounds that contain carbon, chlorine, and fluorine. They are primarily used in refrigeration, air conditioning, and aerosol propellants.

2. **Ozone Layer**: The ozone layer is located in the stratosphere and serves as a protective shield against harmful ultraviolet (UV) radiation from the sun.

3. **Impact of CFCs on Ozone**: When CFCs are released into the atmosphere, they eventually reach the stratosphere. Here, they are broken down by ultraviolet (UV) radiation.

4. **Release of Chlorine**: The breakdown of CFCs in the presence of UV radiation releases chlorine atoms. This process can be summarized as:
- CFCs → UV radiation → Chlorine (Cl)

5. **Chlorine's Role in Ozone Depletion**: The released chlorine atoms are highly reactive and can attack ozone (O₃) molecules. When chlorine reacts with ozone, it forms chlorine monoxide (ClO) and oxygen (O₂):
- Cl + O₃ → ClO + O₂

6. **Destructive Potential of Chlorine**: A single chlorine atom can destroy a large number of ozone molecules. Specifically, one chlorine atom can deplete approximately 100,000 ozone molecules before it is removed from the atmosphere.

7. **Conclusion**: The main component of CFCs that attacks the ozone layer is chlorine.

### Final Answer:
The component of CFC that attacks ozone is **Chlorine**.

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