Which is not correctly matched :

Options

A. Spiegleisan `" " : Mn +Fe+C`
B. Dow's sea water process `" " : Ca(OH)_(2)`
C. Parke's process `" " : Ag`
D. Liquation `" " : ` spelter (Impure Zn)

Explanation

To solve the question "Which is not correctly matched?" regarding metallurgical processes, we need to analyze each option provided:

1. **Specklesian**: This term seems to refer to "spelter," which is a term used for zinc obtained from the smelting process. This option is likely correctly matched.

2. **Dose seawater process**: This likely refers to the extraction of metals from seawater, which is a known method for extracting certain metals like lithium and magnesium. This option appears to be correctly matched.

3. **Parkes process**: This is a well-known method for refining silver from lead ores. It involves the addition of zinc to separate silver from lead. This option is also correctly matched.

4. **Liquation**: This is a metallurgical process used to separate metals from their ores based on their melting points. However, in the context of the question, it is mentioned that pure zinc is obtained by distillation or electrolysis, not by liquation. Therefore, this option is not correctly matched.

### Step-by-Step Solution:
1. **Identify the terms**: Look at each term provided in the options and understand what they refer to in metallurgy.

2. **Analyze each process**:
- **Specklesian**: Confirm that it refers to spelter, which is correct.
- **Dose seawater process**: Understand that this process is used for extracting metals from seawater, which is also correct.
- **Parkes process**: Recognize that this process is used to refine silver from lead, which is correct.
- **Liquation**: Examine the definition and application of liquation and compare it with the extraction of zinc.

3. **Determine the incorrect match**: Based on the analysis, liquation is not the method used to obtain pure zinc, making it the incorrect match.

### Conclusion:
The answer is **D. Liquation** is not correctly matched.