Why is a collodial sol stable ?

Explanation

### Step-by-Step Solution:

1. **Understanding Colloidal Sols**: A colloidal sol is a mixture where very small particles (colloids) are dispersed throughout a medium (liquid or gas). These particles are larger than molecules but smaller than visible particles.

2. **Charge on Colloidal Particles**: Colloidal particles typically carry an electric charge. This charge can be positive or negative, but in a stable colloidal sol, all particles carry the same type of charge.

3. **Repulsion Between Particles**: Because all the colloidal particles carry the same charge, they experience electrostatic repulsion. Like charges repel each other, which prevents the particles from coming too close together.

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