Write the name of the method of concentrated applied for the following ores :
(i) Zinc blende
(ii) Haematite
(iii) Bauxite

Explanation

To solve the question regarding the methods of concentration applied for the given ores, we will analyze each ore one by one and identify the appropriate concentration method.

### Step-by-Step Solution:

1. **Zinc Blende (ZnS)**:
- Zinc blende is a sulfide ore of zinc. The method used for concentrating zinc blende is **Froth Flotation**.
- In this process, the ore is mixed with water and a frothing agent. Air is then blown through the mixture, creating bubbles. The sulfide ore particles attach to the bubbles and rise to the surface, forming a froth, while the impurities remain in the water.

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