Froth floatation process is used for:

Options

A. cuprite
B. zincite
C. copper pyrites
D. bauxite

Answer

### Step-by-Step Solution:

1. **Understanding Froth Flotation Process**: The froth flotation process is a method used for the separation of hydrophobic materials from hydrophilic ones. It is primarily used in the mining industry to extract valuable minerals from ores.

2. **Identifying the Ores**: The question provides four options:
- Cubrite (Cu2O)
- Zincide (ZnS)
- Copper Pyrite (CuFeS2)
- Boxide (Al2O3·xH2O)

3. **Analyzing Each Option**:
- **Cubrite (Cu2O)**: This is a copper oxide and is not a sulfide ore, thus not typically processed by froth flotation.
- **Zincide (ZnS)**: This is a zinc sulfide and can be processed by flotation, but it is not the primary focus of the froth flotation process.
- **Copper Pyrite (CuFeS2)**: This is a copper iron sulfide and is a significant source of copper. It is a sulfide ore and is commonly processed using the froth flotation method.
- **Boxide (Al2O3·xH2O)**: This is an aluminum ore and is not processed using froth flotation.

4. **Conclusion**: Among the given options, Copper Pyrite (CuFeS2) is the only sulfide ore that is processed using the froth flotation method to extract copper.

5. **Final Answer**: The froth flotation process is used for Copper Pyrite (CuFeS2).