Purification of aluminium done by electrolytic refining is known as

Options

A. Serpeck's process
B. Hall's process
C. Baeyer's process
D. Hoop's process

Answer

To solve the question regarding the purification of aluminum done by electrolytic refining, we can break down the steps as follows:

### Step-by-Step Solution:

1. **Understanding the Process**: The question asks about the purification of aluminum through electrolytic refining. This process involves using electricity to separate aluminum from impurities.

2. **Identifying the Correct Term**: The purification method specifically used for aluminum is known as "electrolytic refining."

3. **Clarifying the Options**:
- Sirpex: This is not a recognized term in the context of aluminum purification.
- Purification of Bauxite: Bauxite is the ore from which aluminum is extracted, but this does not refer to the purification of aluminum itself.
- Smelting of Aluminium: Smelting refers to the process of extracting aluminum from its ore, not its purification.
- Electrolytic Refining of Aluminium: This is the correct term for the purification process.

4. **Final Answer**: Therefore, the purification of aluminum done by electrolytic refining is known as "Electrolytic Refining of Aluminium."