Degradation of ozone releasing molecular oxygen is due to

Options

A. CFCs
B. UV-rays
C. CI
D. All of three

Answer

### Step-by-Step Solution:

1. **Understanding Ozone Degradation**: Ozone (O₃) in the stratosphere is crucial for absorbing harmful UV radiation. However, certain substances can lead to its degradation, resulting in the release of molecular oxygen (O₂).

2. **Identifying the Cause**: The question asks for the cause of ozone degradation that leads to the release of molecular oxygen. We need to identify the substances that act as catalysts in this process.

3. **Analyzing the Options**:
- **Option 1: CFCs (Chlorofluorocarbons)**: While CFCs are known to deplete ozone, they do not directly release molecular oxygen. They release chlorine atoms, which then catalyze the breakdown of ozone.
- **Option 2: UV rays**: UV radiation contributes to the breakdown of ozone but does not act as a catalyst that directly releases molecular oxygen.
- **Option 3: Chlorine**: Chlorine acts as a catalyst in the ozone degradation process. It reacts with ozone to produce molecular oxygen, making this option the correct answer.

4. **Conclusion**: The degradation of ozone releasing molecular oxygen is primarily due to chlorine acting as a catalyst in the reaction.

### Final Answer:
The degradation of ozone releasing molecular oxygen is due to **Chlorine**.

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