Which of the following is incorrectly matched :-

Options

A. Electrolytic Reduction - Extraction of Al
B. Cyanide process- Reduction of Pb
C. Leaching - Extraction of Ag
D. Zone refining - Ultra pure Ge

Answer

To determine which of the following options is incorrectly matched regarding the extraction processes of various metals, we will analyze each option step by step.

### Step-by-Step Solution:

1. **Option 1: Electrolytic reduction during extraction of Aluminum**
- The extraction of aluminum is indeed performed through the electrolytic reduction of alumina (Al2O3). In this process, alumina is dissolved in molten cryolite (Na3AlF6) and subjected to electrolysis. Therefore, this statement is **correct**.

2. **Option 2: Cyanide process of reduction of Lead**
- The cyanide process is primarily used for the extraction of gold and silver, not lead. Lead is usually extracted from its ores through reduction using carbon (coke) in a smelting process. Thus, this statement is **incorrect**.

3. **Option 3: Leaching for extraction of Silver**
- The leaching process, particularly using cyanide, is a well-established method for extracting silver from its ores. This process involves dissolving the silver in a cyanide solution, making this statement **correct**.

4. **Option 4: Zone refining process for ultra-pure Germanium**
- Zone refining is a technique used to purify semiconductors, including germanium. This process involves melting a small region of the material and moving that molten zone along the material, allowing impurities to be segregated. Therefore, this statement is **correct**.

### Conclusion:
Based on the analysis above, the incorrectly matched option is **Option 2: Cyanide process of reduction of Lead**.