Electrolytic refining is used to purify which of the following metals?

Options

A. Cu and Zn
B. Ge and Si
C. Zr and Ti
D. Zn and Hg

Answer

To solve the question "Electrolytic refining is used to purify which of the following metals?", we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Electrolytic Refining**:
- Electrolytic refining is a process used to purify metals. It involves the use of an electrolytic cell where oxidation and reduction reactions occur.

2. **Identifying Suitable Metals**:
- Not all metals can be purified using electrolytic refining. We need to focus on metals that can either oxidize or reduce effectively in an electrolytic cell.

3. **Analyzing the Given Options**:
- The question likely provides a list of metals. Common metals that are purified using electrolytic refining include copper and zinc.
- We need to eliminate options that are not metals or do not participate in the electrolytic refining process.

4. **Excluding Non-Metals and Inactive Metals**:
- Elements like germanium and silicon are p-block elements and are generally non-metals. They do not participate in electrolytic refining because they lack the tendency to gain or lose electrons.
- Other metals such as zirconium and titanium are also not typically refined using this method.

5. **Conclusion**:
- Based on the analysis, the metals that are commonly purified using electrolytic refining are copper and zinc. Therefore, if these options are present, they would be the correct answers.

### Final Answer:
Electrolytic refining is used to purify metals such as **copper** and **zinc**.

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