What are lyophilic and lyophobic sols ? Give one example of each type. Which one of these two types of sols is easily coagulated and why?

Explanation

### Step-by-Step Solution

1. **Definition of Lyophilic and Lyophobic Sols**:
- **Lyophilic Sols**: These are colloidal solutions that have a strong affinity for the dispersion medium (solvent). The term "lyophilic" means "liquid-loving". They readily mix with the solvent and are stable in nature.
- **Lyophobic Sols**: These are colloidal solutions that have little to no affinity for the dispersion medium. The term "lyophobic" means "liquid-hating". They do not mix well with the solvent and tend to separate out or precipitate.

2. **Characteristics of Lyophilic Sols**:
- Strong affinity for the dispersion medium.
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