The stability of lyophilic collid is due to which of the following `:`

Options

A. Charge on their particles
B. Large size of their particles
C. Small size of their particles
D. Solvation by dispersion medium

Explanation

To determine the stability of lyophilic colloids, let's analyze the options provided in the question step by step.

### Step-by-Step Solution:

1. **Understanding Lyophilic Colloids**:
- Lyophilic colloids are also known as solvent-loving colloids. They have a strong affinity for the dispersion medium (the liquid in which they are dispersed).

2. **Analyzing the Options**:
- **Charge on their particles**: While charge can influence stability in some colloids, it is not the primary reason for the stability of lyophilic colloids.
- **Large size of their particles**: The size of the particles does not necessarily contribute to the stability of lyophilic colloids. Stability is more about the interaction with the dispersion medium.
- **Small size of their particles**: Similar to large particles, small particle size does not inherently provide stability for lyophilic colloids.
- **Solvation by dispersion medium**: This refers to the interaction between the colloidal particles and the solvent. Lyophilic colloids are stabilized by the solvation process, where the particles are surrounded and stabilized by the molecules of the dispersion medium.

3. **Conclusion**:
- The stability of lyophilic colloids is primarily due to solvation by the dispersion medium. This strong interaction allows the colloidal particles to remain dispersed and prevents them from aggregating.

### Final Answer:
The stability of lyophilic colloids is due to **solvation by dispersion medium**.

---