The process of froth floatation and chromatography are based on

Options

A. Emulsification
B. Adsorption
C. Absorption
D. none of these

Answer

### Step-by-Step Solution:

1. **Understanding Froth Flotation**:
- Froth flotation is a process used primarily for the separation of minerals from gangue based on differences in their hydrophobicity (wettability).
- In this process, minerals (which are hydrophobic) attach to air bubbles and rise to the surface, forming a froth, while the gangue (which is hydrophilic) remains in the water.

2. **Understanding Chromatography**:
- Chromatography is a technique used to separate and analyze components in a mixture based on their distribution between a stationary phase and a mobile phase.
- The stationary phase is typically a solid or a viscous liquid (like alumina or silica gel), while the mobile phase can be a liquid or gas that moves through the stationary phase.

3. **Common Principle**:
- Both processes rely on the principle of adsorption, where certain substances adhere to the surface of another material.
- In froth flotation, the minerals adsorb onto the air bubbles, while in chromatography, the components of the mixture adsorb onto the stationary phase to varying degrees based on their chemical properties.

4. **Conclusion**:
- Therefore, both froth flotation and chromatography are purification techniques based on the principle of adsorption.

### Final Answer:
Both froth flotation and chromatography are based on the principle of **adsorption**.

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