Name the substance used as depressant in the separation of two sulphide ores in Froth floatation method.

Explanation

To answer the question regarding the substance used as a depressant in the separation of two sulfide ores in the froth flotation method, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Froth Flotation Method**:
- The froth flotation method is a process used to separate hydrophobic materials from hydrophilic ones. It is commonly used for the separation of sulfide ores from gangue (waste material).

2. **Identifying the Problem**:
...