_________ is a process in which a metal or an alloy is coated with a layer of another metal.

Options

A. Electrolysis
B. LED
C. Electroplating
D. Neutralization

Answer

**Step-by-Step Solution:**

1. **Understanding the Process**: The question asks for a specific process where a metal or an alloy is coated with a layer of another metal. This is a common practice in metallurgy and manufacturing.

2. **Identifying the Term**: The process of coating one metal with another is known as "electroplating." This term is widely used in various applications, including jewelry, automotive parts, and household items.

3. **Explaining Electroplating**: Electroplating involves using an electric current to reduce dissolved metal cations so that they form a coherent metal coating on an electrode. This process can enhance the appearance, corrosion resistance, and durability of the base metal.

4. **Examples of Electroplating**:
- **Chromium Plating**: In this process, iron or steel is coated with chromium. The benefits include a shiny finish and resistance to corrosion.
- **Tin Coating**: Here, iron is coated with tin, which provides a good appearance, is non-poisonous, and prevents corrosion. This is commonly seen in food cans.

5. **Conclusion**: Therefore, the answer to the question is "Electroplating."

**Final Answer**: Electroplating is a process in which a metal or an alloy is coated with a layer of another metal.

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