Why is the froth flotation method selected for the concentration of Sulphide ores ?

Explanation

**Step-by-Step Solution:**

1. **Understanding Froth Flotation Method**: The froth flotation method is a process used to separate hydrophobic materials from hydrophilic ones. It is particularly effective for the concentration of sulphide ores.

2. **Components of the Process**: The froth flotation process involves a mixture of water and pine oil. Pine oil acts as a frothing agent that helps to create a froth in which the desired minerals can be separated.

3. **Wetting Properties**: The key to the froth flotation method lies in the difference in wetting properties between the sulphide ores and the gangue (unwanted materials). Sulphide ores are selectively wetted by pine oil, while the gangue is not.

...