Mac Arthur-Forrest process is used for the extraction of

Options

A. aluminium
B. copper
C. silver
D. tin

Explanation

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

1. **Identify the Process**: The Mac Arthur-Forrest process is primarily used for the extraction of precious metals, specifically silver (Ag) and gold (Au).

2. **Focus on Silver Extraction**: For this explanation, we will focus on the extraction of silver from its ore, argentite (Ag2S).

3. **Chemical Reaction**: The argentite ore reacts with sodium chloride (NaCl). The reaction leads to the formation of a soluble complex.

4. **Formation of Soluble Complex**: The reaction can be represented as:
\[ \text{Ag}_2\text{S} + \text{NaCl} \rightarrow \text{NaAg(CN)}_2 + \text{Na}_2\text{SO}_4 \]
Here, NaAg(CN)2 is the soluble complex formed.

5. **Principle of the Process**: The principle behind this process is that the metal (silver) forms a soluble complex, while the impurities remain insoluble. This allows for the separation of silver from the ore.

6. **Role of Oxygen**: Oxygen is also introduced in the process as it acts as an oxidizing agent, facilitating the oxidation of the silver ore.

7. **Conclusion**: The Mac Arthur-Forrest process effectively separates silver from its ore by forming a soluble complex, allowing for the removal of impurities.

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