Which of the following statements is correct about the role of substances addedd in the froth floatation process?

Options

A. Collectors enhance the non-wettability of ore particles.
B. Collectors enhance the wettability of gangue particules.
C. Collectors help in separating two sulphide ores present in the mixture.
D. Collectors helps ore particles to settle down below the froth .

Answer

To determine which statement is correct about the role of substances added in the froth flotation process, we need to analyze each option based on our understanding of the process.

### Step-by-Step Solution:

1. **Understanding Froth Flotation Process**:
- Froth flotation is a method used for separating hydrophobic materials from hydrophilic ones. It is commonly used in the mining industry to separate valuable minerals from their ores.

2. **Role of Collectors**:
- Collectors are substances added to the flotation process that enhance the non-wettability of the ore particles. They make the ore particles hydrophobic (water-repellent), allowing them to attach to air bubbles and rise to the surface, forming a froth.

3. **Analyzing Each Option**:
- **Option 1**: "Collector enhances the non-wettability of the ore particles."
- This statement is correct because collectors make the ore particles water-repellent.
- **Option 2**: "Collector enhances the wettability of the gangue particles."
- This statement is incorrect because collectors do not enhance the wettability of gangue; instead, they make the gangue particles more wettable compared to the ore.
- **Option 3**: "Collectors help in separating two sulfide ores within the mixture."
- This statement is incorrect as collectors are primarily used to make ore particles hydrophobic, not specifically for separating different sulfide ores.
- **Option 4**: "Collectors help ore particles to settle down below the pole."
- This statement is incorrect because the purpose of collectors is to allow ore particles to float, not settle.

4. **Conclusion**:
- The correct statement is **Option 1**: "Collector enhances the non-wettability of the ore particles."

### Final Answer:
The correct statement about the role of substances added in the froth flotation process is: **Option 1 - Collector enhances the non-wettability of the ore particles.**