Hall-Heroult method is used during extraction of :-

Options

A. Ti
B. Al
C. Au
D. Zn

Answer

**Step-by-Step Solution:**

1. **Identify the Method**: The Hall-Heroult method is a well-known process used for the extraction of certain metals from their ores.

2. **Determine the Metal**: Among the options provided (Titanium, Aluminium, Gold, Zinc), we need to identify which metal is extracted using the Hall-Heroult method.

3. **Recall the Ore**: The primary ore used in the Hall-Heroult method is bauxite, which is primarily composed of aluminum oxide (Al2O3·2H2O).

4. **Electrolytic Process**: The Hall-Heroult process involves an electrolytic cell where aluminum ions are reduced to aluminum metal at the cathode, while oxidation occurs at the anode.

5. **Anode and Cathode Reactions**:
- At the anode, carbon reacts with oxygen ions to produce carbon dioxide and electrons.
- At the cathode, aluminum ions are reduced by gaining electrons to form aluminum metal.

6. **Conclusion**: Based on the above information, it is clear that the Hall-Heroult method is specifically used for the extraction of aluminum.

7. **Final Answer**: Therefore, the correct option is **option 2: Aluminium**.

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