What are freons ?

Explanation

### Step-by-Step Solution:

1. **Definition of Freons**:
Freons are a group of chemical compounds known as chlorofluorocarbons (CFCs). They are derived from methane (CH₄) and ethane (C₂H₆) by replacing hydrogen atoms with chlorine and fluorine atoms.

2. **Chemical Composition**:
The general structure of Freons includes carbon, chlorine, and fluorine. For example, one of the most well-known Freons is Freon-12, which has the chemical formula CF₂Cl₂. This indicates that it contains one carbon atom, two fluorine atoms, and two chlorine atoms.

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