Which of the following metals is used in electroplating to make objects appear shining?

Options

A. iron
B. chromium
C. copper
D. aluminium

Answer

**Step-by-Step Solution:**

1. **Understanding Electroplating:**
- Electroplating is a process that uses electric current to reduce dissolved metal cations so that they form a coherent metal coating on an electrode. This process is often used to enhance the appearance and durability of objects.

2. **Identifying the Purpose of Electroplating:**
- The primary purposes of electroplating include making objects shiny, providing corrosion resistance, and enhancing scratch resistance.

3. **Choosing the Right Metal:**
- Among various metals, certain metals are preferred for electroplating due to their properties. The metal used for electroplating should ideally provide a shiny finish and resist corrosion and scratches.

4. **Evaluating Common Metals:**
- Common metals such as iron, copper, and aluminum do not possess the desired characteristics for electroplating when compared to chromium. They may corrode easily or not provide a shiny finish.

5. **Identifying the Correct Metal:**
- Chromium is widely used in electroplating because it provides a shiny appearance and is resistant to scratches and corrosion. It is commonly used on car parts, bicycle rims, and bathroom fixtures.

6. **Conclusion:**
- Therefore, the metal used in electroplating to make objects appear shiny is **chromium**.

**Final Answer:**
- The metal used in electroplating to make objects appear shiny is **chromium**.

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