High purity copper is obtained by

Options

A. Zone refining
B. Poling
C. Electrolytic refining
D. Cupelling

Explanation

To determine how high purity copper is obtained, we can analyze the given options step by step:

### Step 1: Understand the Methods Listed
We have four methods to consider:
1. Zone refining
2. Poling
3. Electrolytic refining
4. Cupling

### Step 2: Analyze Each Method
- **Zone Refining**: This method is primarily used for purifying semiconductors like germanium and silicon. It is not suitable for copper, as it is not designed for metals like copper.

- **Poling**: This method is used to remove oxidized impurities from molten metals. While it can reduce some impurities, it is not very efficient for achieving high purity in metals like copper.

- **Electrolytic Refining**: This method involves the use of an electrolytic cell where impure copper is made the anode and pure copper is deposited at the cathode. This process can remove up to 99.99% of impurities, making it the most effective method for obtaining high purity copper.

- **Cupling**: This term is not commonly associated with a method for purifying copper and is likely not relevant in this context.

### Step 3: Conclusion
Based on the analysis, the most effective method for obtaining high purity copper is **Electrolytic Refining**.

### Final Answer
High purity copper is obtained by **Electrolytic Refining**.

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