The method of electrolytic refining is not suitable in the extraction of

Options

A. Aluminium
B. Copper
C. Mercury
D. Silver

Answer

**Step-by-Step Solution:**

1. **Understanding Electrolytic Refining**: Electrolytic refining is a process used to purify metals by using an electric current to drive the purification process. It is effective for metals that can be easily dissolved and deposited from their solutions.

2. **Identifying Metals Suitable for Electrolytic Refining**: Common metals that are refined using this method include copper, silver, and gold. These metals can be dissolved in an electrolyte solution and then deposited on the cathode during electrolysis.

3. **Analyzing the Extraction of Mercury**: Mercury is a unique metal that does not behave like most other metals. It is liquid at room temperature and has different chemical properties. The extraction and refining of mercury typically involve hydrometallurgical methods rather than electrolytic refining.

4. **Understanding Hydrometallurgy**: Hydrometallurgy is a method of extracting metals from their ores using aqueous solutions. For mercury, it can be leached from ores using sodium hydroxide and sodium sulfide solutions, which effectively separate it from impurities.

5. **Conclusion**: Given the unique properties of mercury and the methods used for its extraction and refining, electrolytic refining is not suitable for mercury. Instead, hydrometallurgy is the preferred method for obtaining high-purity mercury.

**Final Answer**: The method of electrolytic refining is not suitable in the extraction of mercury.

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