Whch ore can be best concentrated by froth flotation process ?

Options

A. Malachite
B. Cassiterite
C. Galena
D. Manetite

Explanation

**Step-by-Step Solution:**

1. **Understanding the Froth Flotation Process:**
The froth flotation process is a method used to separate hydrophobic materials from hydrophilic ones. It is particularly effective for concentrating low-grade sulfide ores.

2. **Identifying the Types of Ores:**
The question asks which ore can be best concentrated by the froth flotation process. We need to identify the ores listed in the options and determine if they are sulfide ores.

3. **Analyzing the Given Ores:**
- **Malachite (CuCO3·Cu(OH)2):** This is a carbonate ore of copper, not a sulfide ore.
- **Cassiterite (SnO2):** This is an oxide ore of tin, not a sulfide ore.
- **Magnetite (Fe3O4):** This is an oxide ore of iron, not a sulfide ore.
- **Galena (PbS):** This is a sulfide ore of lead.

4. **Conclusion:**
Since the froth flotation process is specifically used for sulfide ores, the only ore listed that fits this criterion is galena (PbS). Therefore, galena can be best concentrated by the froth flotation process.

**Final Answer:**
Galena (PbS) is the ore that can be best concentrated by the froth flotation process.

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