Identify the incorrect statement from the following:

Options

A. Ozone absorbs the intense ultraviolet radiation of the sun.
B. Depletion of ozone layer is because of its chemical reactions with chlorofluoro alkanes.
C. Ozone absorbs infrared radiation
D. Oxides of nitrogen in the atmosphere can cause the depletion of ozone layer.

Answer

To identify the incorrect statement regarding ozone and its effects, we need to analyze each statement provided in the question.

1. **Ozone absorbs intense and harmful radiation from the sun.**
- This statement is **true**. The ozone layer in the Earth's stratosphere absorbs the majority of the sun's harmful ultraviolet (UV) radiation, protecting living organisms on Earth.

2. **The ozone layer is found in the lower portion of the Earth's atmosphere.**
- This statement is **incorrect**. The ozone layer is actually located in the stratosphere, which is the second layer of the Earth's atmosphere, above the troposphere (the lowest layer).

3. **Ozone absorbs about 97-99% of UV radiation from the sun.**
- This statement is **true**. The ozone layer is effective in absorbing a significant portion of UV radiation, which is crucial for protecting life on Earth.

4. **The depletion of the ozone layer is mainly caused by chlorofluorocarbons (CFCs).**
- This statement is **true**. CFCs are known to be significant contributors to ozone layer depletion due to their chemical reactions that break down ozone molecules.

5. **Natural causes are factors in ozone depletion.**
- This statement is **true**. While human-made chemicals like CFCs are the primary cause of ozone depletion, natural phenomena can also contribute to changes in ozone levels.

### Conclusion:
The **incorrect statement** is: **"The ozone layer is found in the lower portion of the Earth's atmosphere."**