Which metal is used to coat iron objects to provide shiny and scratch-resistant surface?

Options

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

Answer

**Step-by-Step Solution:**

1. **Understanding the Purpose of Coating Iron Objects:**
- Iron objects are often coated to enhance their appearance and durability. The coating provides a shiny finish and makes the surface resistant to scratches.

2. **Identifying the Process of Coating:**
- The process used to apply a coating to iron objects is known as electroplating. This involves using electricity to deposit a layer of metal onto the surface of the iron.

3. **Recognizing the Benefits of Coating:**
- The coating not only makes the iron objects look shiny but also protects them from corrosion, which is a common problem with iron.

4. **Determining the Metal Used for Coating:**
- Among various metals that can be used for coating, one metal stands out for its properties of being shiny, scratch-resistant, and corrosion-resistant.

5. **Identifying the Correct Metal:**
- The metal that is commonly used to coat iron objects for these benefits is Chromium. It is known for its shiny finish and ability to resist scratches and corrosion.

6. **Final Answer:**
- Therefore, the metal used to coat iron objects to provide a shiny and scratch-resistant surface is **Chromium**.