The method used for the purification of Indium is :

Options

A. van arkel method
B. liquation
C. zone refining
D. vapour phase refining

Answer

To solve the question regarding the purification method used for Indium, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks for the method used for the purification of Indium. We need to identify the correct purification technique from the options provided (though the options are not listed here).

2. **Identifying Purification Methods**: There are several methods for purifying metals, including:
- Electrolytic refining
- Distillation
- Zone refining
- Precipitation

3. **Researching Indium Purification**: Indium is a metal that requires high purity for its applications, particularly in electronics and semiconductors.

4. **Selecting the Appropriate Method**: Among the methods listed, zone refining is particularly known for producing metals with very high purity. This method involves melting a small region (zone) of the material and moving this molten zone along the solid material. Impurities are concentrated in the molten zone and are removed as the zone moves.

5. **Conclusion**: Based on the characteristics of the purification methods and the specific needs for Indium, the most suitable method for purifying Indium is **zone refining**.

### Final Answer:
The method used for the purification of Indium is **zone refining**.

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