Iron cans are coated with a layer of ______ to reduce poisonous chemicals that can harm our health.

Options

A. Zinc
B. Tin
C. Chromium
D. Nickel

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks what material is used to coat iron cans to prevent harmful chemicals from affecting our health.

2. **Identifying the Coating Material**: Iron cans are often coated with a protective layer to prevent rusting and to avoid the leaching of harmful substances into food or beverages stored in them.

3. **Common Coating Materials**: The most common materials used for coating iron cans include tin and other non-toxic substances. Tin is particularly used because it prevents rust and is safe for food contact.

4. **Final Answer**: Therefore, the correct answer to the question is that iron cans are coated with a layer of **tin** to reduce poisonous chemicals that can harm our health.

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