Select correct matching :-

Options

A. Pyrometallurgy : Extraction of Fe
B. Electrometallurgy : Extraction of Al
C. Hydrometallurgy : Extraction of Au
D. All above are correct

Answer

To solve the question regarding the correct matching of metallurgical processes with the metals they extract, we will analyze each option step by step.

### Step-by-Step Solution:

1. **Understanding Pyro Metallurgy**:
- Pyro metallurgy is a thermal process that involves the extraction of metals from their ores using heat.
- It is primarily used for the extraction of iron (Fe).
- The process involves converting the ore into a liquid form in a furnace, where pure iron is obtained.
- **Conclusion**: Pyro metallurgy is used for the extraction of iron (Fe) - **Correct Statement**.

2. **Understanding Electro Metallurgy**:
- Electro metallurgy is a process that uses electrical energy to extract metals from their ores.
- It is commonly used for the extraction of aluminum (Al).
- The process involves the electrolysis of aluminum oxide to obtain pure aluminum.
- **Conclusion**: Electro metallurgy is used for the extraction of aluminum (Al) - **Correct Statement**.

3. **Understanding Hydro Metallurgy**:
- Hydro metallurgy is a process that involves the use of aqueous solutions to extract metals from their ores.
- It is particularly used for the extraction of gold (Au).
- The process typically involves reacting gold sulfide with sodium cyanide (NaCN) to form a soluble complex, followed by the addition of zinc to precipitate pure gold.
- **Conclusion**: Hydro metallurgy is used for the extraction of gold (Au) - **Correct Statement**.

4. **Final Conclusion**:
- Since all the statements regarding the extraction processes (Pyro metallurgy for iron, Electro metallurgy for aluminum, and Hydro metallurgy for gold) are correct, we conclude that the correct option is:
- **Option D: All above are correct**.

### Final Answer:
**Option D: All above are correct.**