Concentration of copper glance is done by

Options

A. Leaching
B. Magnetic separation
C. Hydraulic washing
D. Froth Floation method

Answer

To solve the question regarding the concentration of copper glance, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Ore**:
- Copper glance is known as chalcopyrite, which has the chemical formula Cu₂S (copper(I) sulfide).

2. **Understand Concentration Methods**:
- There are several methods for concentrating ores, including leaching, magnetic separation, hydraulic washing, and froth flotation.

3. **Determine the Suitable Method**:
- Copper glance is a sulfide ore. The concentration of sulfide ores is typically done using the froth flotation method.

4. **Explain Froth Flotation**:
- The froth flotation method works on the principle of preferential wetting. In this process, the ore particles are preferentially wetted by oil, while the gangue (waste material) is wetted by water. This allows for the separation of valuable minerals from the waste material.

5. **Conclude the Answer**:
- Since copper glance (Cu₂S) is a sulfide ore, the concentration is done by the froth flotation method. Therefore, the correct answer is option 4: froth flotation method.

### Final Answer:
The concentration of copper glance is done by the froth flotation method.

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