Name the chemicals which are used in refrigerators and air conditioners and damage ozone layer when released in air.

Explanation

### Step-by-Step Solution:

1. **Identify the Chemicals**: The primary chemicals used in refrigerators and air conditioners that damage the ozone layer are known as CFCs, which stands for chlorofluorocarbons.

2. **Explain CFCs**: CFCs are compounds made up of carbon, chlorine, and fluorine. They were commonly used as refrigerants in cooling systems due to their stability and efficiency.

3. **Mechanism of Ozone Layer Damage**: When CFCs are released into the atmosphere, they eventually reach the stratosphere where the ozone layer is located. Here, they undergo a chemical reaction that releases chlorine atoms.

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