Soaps essentially form a colloidal solution in water and remove the greasy matters by :

Options

A. adsorption
B. emulsification
C. coagulation
D. absorption

Answer

To solve the question regarding how soaps form a colloidal solution in water and remove greasy matters, we can break down the process into several steps:

### Step-by-Step Solution:

1. **Understanding Soap Composition**:
- Soaps are salts of fatty acids, typically formed by the reaction of a fatty acid with a strong base like sodium hydroxide (NaOH). This results in a long hydrocarbon chain with a carboxylate group at one end.

2. **Colloidal Solution Formation**:
- When soap is added to water, it does not dissolve completely like a typical ionic compound. Instead, it forms a colloidal solution. This is due to the soap molecules arranging themselves into structures called micelles.

3. **Micelle Formation**:
- A micelle is a spherical structure where the hydrophobic (water-repelling) tails of soap molecules point inward, while the hydrophilic (water-attracting) heads point outward. This arrangement allows the soap to interact with both water and oily substances.

4. **Emulsification Process**:
- Greasy matters, which are typically non-polar substances, do not mix well with water. However, when soap is added, the hydrophobic tails of the soap molecules attach to the grease, while the hydrophilic heads remain in contact with water. This process is known as emulsification.

5. **Removal of Greasy Matter**:
- As the soap molecules surround the greasy particles, they form an emulsion, effectively breaking down the grease into smaller droplets that can be suspended in water. This allows the greasy matter to be washed away when rinsed with water.

6. **Conclusion**:
- Therefore, soaps remove greasy matters by the process of emulsification, which allows the greasy substances to be dispersed in water and subsequently washed away.

### Final Answer:
Soaps essentially form a colloidal solution in water and remove greasy matters by **emulsification**.