Which of these is plated on the iron to prevent it from chemically reacting with food ?

Options

A. Gold
B. Silver
C. Chromium
D. Tin

Answer

To determine which metal is plated on iron to prevent it from chemically reacting with food, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Question**: The question asks which metal is used to coat iron to prevent it from reacting with food.

2. **Identify the Options**: The options provided are gold, silver, chromium, and tin.

3. **Consider the Properties of Iron**: Iron is a reactive metal that can corrode and react with various substances, including food. This reaction can lead to undesirable chemical changes.

4. **Research Common Coatings for Iron**: In food preservation, certain metals are used to coat iron to prevent reactions. One common method is to use a non-reactive metal as a barrier.

5. **Evaluate Each Option**:
- **Gold**: While gold is non-reactive, it is expensive and not commonly used for coating iron in food containers.
- **Silver**: Silver also has antibacterial properties but is not typically used for coating iron in food applications.
- **Chromium**: Chromium is used for its corrosion resistance but is not the primary coating for food-related iron containers.
- **Tin**: Tin is widely used to coat iron, especially in tin cans, because it prevents iron from coming into direct contact with food, thus avoiding chemical reactions.

6. **Conclusion**: After evaluating the options, the metal that is plated on iron to prevent it from chemically reacting with food is **tin**.

### Final Answer:
The metal plated on iron to prevent it from chemically reacting with food is **tin**.

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