Freons are not recommended to be used refrigerators because they

Options

A. Cause global warming
B. Cause acid rain
C. Cause depletion of ozone layer
D. Cause very less cooling

Explanation

**Step-by-Step Solution:**

1. **Understanding Freons**: Freons are a group of chemicals known as chlorofluorocarbons (CFCs) that were commonly used as refrigerants in refrigerators and air conditioning systems.

2. **Properties of Freons**: Freons are non-flammable gases with a sweet smell, often compared to fresh-cut grass. They are effective in cooling systems due to their thermodynamic properties.

3. **Environmental Impact**: The primary concern with the use of Freons is their environmental impact, particularly their role in ozone layer depletion. When CFCs are released into the atmosphere, they eventually reach the stratosphere.

4. **Breakdown of CFCs**: In the stratosphere, CFC molecules are broken down by ultraviolet (UV) radiation. This breakdown releases chlorine atoms.

5. **Reaction with Ozone**: The released chlorine atoms are highly reactive and can react with ozone (O₃) molecules in the stratosphere. This reaction leads to the destruction of ozone molecules.

6. **Consequences of Ozone Depletion**: The depletion of the ozone layer is concerning because the ozone layer protects the Earth from harmful UV radiation. Increased UV radiation can lead to various environmental and health issues, including skin cancer and harm to ecosystems.

7. **Conclusion**: Due to the harmful effects of Freons on the ozone layer, they are not recommended for use in refrigerators and other cooling systems.

**Final Answer**: Freons are not recommended for use in refrigerators because they contribute to ozone layer depletion by releasing chlorine atoms that react with and destroy ozone molecules in the stratosphere.

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