Which of the following is incorrect regarding ozone?

Options

A. It absorbas UV radiations
B. It converts UV radiation into heat radiations
C. It is situated at height range 40-50 km from surface of earth (in stratosphere)
D. It can be reparied by chloro-fluoro-carbon (CFC) gas

Answer

To determine which statement regarding ozone is incorrect, let's analyze each of the provided statements step by step.

1. **Statement 1: Ozone absorbs UV radiation.**
- Ozone (O3) is known for its ability to absorb ultraviolet (UV) radiation from the sun. This is a true statement. The absorption of UV radiation by ozone is crucial as it protects living organisms on Earth from harmful UV rays.

2. **Statement 2: Ozone converts UV radiation into heat radiation.**
- When ozone absorbs UV radiation, it undergoes photolytic decomposition, which results in the conversion of UV energy into heat energy. This statement is also true, as the energy absorbed contributes to warming the stratosphere.

3. **Statement 3: Ozone is situated at a height range of 40 to 50 kilometers from the surface of the Earth in the stratosphere.**
- The ozone layer is indeed found in the stratosphere, typically at altitudes between 10 to 50 kilometers above the Earth's surface. The statement that it is located at 40 to 50 kilometers is somewhat accurate, although it can also be found at lower altitudes. However, for the purpose of this question, we can consider this statement true as it reflects the general location of the ozone layer.

4. **Statement 4: Ozone can be repaired by chlorofluorocarbon (CFC).**
- This statement is incorrect. Chlorofluorocarbons (CFCs) are known to deplete the ozone layer rather than repair it. CFCs release chlorine atoms when they are broken down by UV radiation, and these chlorine atoms can destroy ozone molecules. Therefore, this statement is false.

Based on the analysis above, the incorrect statement regarding ozone is:

**Answer: Ozone can be repaired by chlorofluorocarbon (CFC).**