Why are tin coated iron cans used for cool drinks but not cans. Explain.

Explanation

**Step-by-Step Solution:**

1. **Understanding the Material**: Iron is a common metal used for making cans, but it can rust and corrode when it comes into contact with moisture and acidic substances, which are often found in cool drinks.

2. **Electroplating Process**: To prevent rusting and corrosion, iron cans are coated with a thin layer of tin through a process called electroplating. This involves depositing tin onto the surface of the iron can.

3. **Purpose of Tin Coating**: The tin coating serves as a protective barrier. It prevents the cool drinks from coming into direct contact with the iron, which helps to avoid any chemical reactions that could lead to spoilage.

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