Elecyroltic 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

Explanation

**Step-by-Step Solution:**

1. **Understanding Electrolytic Refining**: Electrolytic refining is a process used to purify metals by using electrolysis. In this process, an impure metal is used as the anode, and a pure metal is used as the cathode.

2. **Identifying the Metals**: The question asks which metals can be purified using electrolytic refining. The common metals that are purified using this method include copper and zinc.

3. **Process Description**:
- **Anode**: The impure metal (for example, blister copper or impure zinc) is placed at the anode.
- **Cathode**: A pure metal plate is used as the cathode.
- **Electrolyte**: A suitable electrolyte solution is used to facilitate the flow of ions.

4. **Reaction During Electrolysis**:
- At the anode, the impure metal oxidizes and dissolves into the electrolyte, releasing metal ions.
- At the cathode, the metal ions from the electrolyte are reduced and deposit as pure metal.

5. **Result**: The impurities that do not dissolve in the electrolyte settle down as anode mud, while pure metal is deposited on the cathode.

6. **Conclusion**: Therefore, the metals that are commonly purified by electrolytic refining are copper and zinc.

**Final Answer**: Copper and Zinc.

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