For which ore of the metal, froth floatation method is used for concentration?

Options

A. Haematite
B. Zinc blende
C. Magnetite
D. Carnallite

Answer

To determine which ore of the metal uses the froth flotation method for concentration, we can follow these steps:

### Step-by-Step Solution:

1. **Understand Froth Flotation Method**: The froth flotation method is a process used for the concentration of ores, particularly effective for sulfide ores. It involves the separation of hydrophobic materials from hydrophilic ones.

2. **Identify the Ores Given**: The options provided are:
- Hematite (Fe₂O₃)
- Zinc Blend (ZnS)
- Magnetite (Fe₃O₄)
- Carnallite (KCl·MgCl₂·6H₂O)

3. **Classify the Ores**:
- Hematite (Fe₂O₃) is an oxide ore of iron.
- Zinc Blend (ZnS) is a sulfide ore of zinc.
- Magnetite (Fe₃O₄) is also an oxide ore of iron.
- Carnallite (KCl·MgCl₂·6H₂O) is a mineral containing potassium and magnesium salts.

4. **Determine the Correct Ore**: Since the froth flotation method is specifically used for sulfide ores, we need to identify which of the options is a sulfide ore.
- Among the options, Zinc Blend (ZnS) is the only sulfide ore.

5. **Conclusion**: Therefore, the correct answer is Zinc Blend (ZnS), as it is the ore for which the froth flotation method is used for concentration.

### Final Answer:
The froth flotation method is used for the concentration of Zinc Blend (ZnS).

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