( e) Phenimenon of removing layers of basic oxides from metals before electroplating is called _____.

Explanation

**Step-by-Step Text Solution:**

1. **Understanding the Question**: The question asks for the term that describes the process of removing layers of basic oxides from metals before the electroplating process.

2. **Identifying the Process**: The process of removing these oxide layers is essential to prepare the metal surface for electroplating, ensuring better adhesion of the plating material.

3. **Defining the Term**: The specific term used for this process is "pickling."

4. **Explaining Pickling**: Pickling is a method where the impure metal is immersed in a dilute acid solution. This acid reacts with the basic oxides present on the surface of the metal, effectively removing them.

5. **Conclusion**: Therefore, the phenomenon of removing layers of basic oxides from metals before electroplating is called "pickling."

**Final Answer**: Pickling

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