Which of the following statements is correct for a lyophilic sol?

Options

A. It is not easily solvated
B. The coagulation of this sol is irreversible in nature
C. It is unstable
D. It is quite stable in a solvent

Answer

To solve the question regarding the characteristics of a lyophilic sol, we need to analyze the properties of such a sol and identify the correct statement among the options provided.

### Step-by-Step Solution:

1. **Understanding Lyophilic Sols**:
- A lyophilic sol is a type of colloidal solution where the dispersed phase (dp) has a strong affinity for the dispersion medium (dm). This means that the particles of the dispersed phase are well-solvated or hydrated in the medium.

**Hint**: Remember that "lyophilic" means "solvent-loving," indicating a strong interaction between the solute and solvent.

2. **Hydration of Particles**:
- Due to the strong affinity between the dispersed phase and the dispersion medium, the particles of the dispersed phase are well-hydrated. This hydration creates a protective layer around the particles, preventing them from aggregating into larger particles.

**Hint**: Think about how hydration affects particle stability in a colloidal solution.

3. **Coagulation Characteristics**:
- Coagulation in lyophilic sols is generally reversible. If the sol is coagulated (for example, by shaking or adding a different medium), it can easily revert back to its colloidal state. This is because the protective hydration layer allows the particles to re-disperse without needing external energy.

**Hint**: Consider what happens to the sol when external conditions change and how the particles behave.

4. **Stability of Lyophilic Sols**:
- Lyophilic sols are stable due to the protective layers formed by hydration. This stability means they do not easily break down or coagulate under normal conditions.

**Hint**: Stability is key in understanding the behavior of colloids; think about what factors contribute to this stability.

5. **Conclusion**:
- Based on the properties discussed, the correct statement regarding lyophilic sols is that they are stable in the solvent due to the protective hydration layer around the dispersed phase particles.

### Final Answer:
The correct statement for a lyophilic sol is: "It is quite stable in solvent due to the protective layer of the dispersed phase."