Which of the following process is used based on the ability of metal being converted into volatile compound ?

Options

A. Hydraulic washing
B. Froth floatation
C. Vapour phase refining
D. Electrolytic refining

Answer

To solve the question "Which of the following processes is used based on the ability of metal being converted into a volatile compound?" we will analyze the options provided: hydrolyquic acid, froth flotation, vapor-phase refining, and illotally refining.

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks for a process that utilizes the ability of a metal to be converted into a volatile compound. This means we are looking for a refining method that involves the formation of a gas or vapor from a metal.

2. **Analyzing the Options**:
- **Hydrolyquic Acid**: This is not a recognized process in metallurgy related to the conversion of metals into volatile compounds.
- **Froth Flotation**: This is a concentration process used for separating hydrophobic materials from hydrophilic ones, typically used for sulfide ores. It does not involve the formation of volatile compounds.
- **Vapor-Phase Refining**: This process involves converting a metal into its volatile compound, collecting the vapors, and then decomposing them to retrieve the pure metal. This is a direct application of the ability of a metal to form a volatile compound.
- **Illotally Refining**: This is an electrolytic refining method where impure metal is used as an anode and pure metal is deposited at the cathode. It does not involve the conversion of a metal into a volatile compound.

3. **Identifying the Correct Process**: Based on the analysis, the only process that involves the conversion of a metal into a volatile compound is **Vapor-Phase Refining**.

4. **Conclusion**: Therefore, the correct answer to the question is **Vapor-Phase Refining**.

### Final Answer:
**Vapor-Phase Refining** is the process used based on the ability of metal being converted into a volatile compound.

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