Tyndall effect shown effectively in which of the following

Options

A. Suspension
B. Lyophilic sol
C. Lyophobic sol
D. True solution

Answer

To determine which of the following options shows the Tyndall effect most effectively, we need to understand the nature of each type of mixture and how they interact with light.

### Step-by-Step Solution:

1. **Understanding the Tyndall Effect**:
- The Tyndall effect is the scattering of light by small particles suspended in a medium. This effect is observed when a beam of light passes through a colloidal solution or suspension, causing the light to scatter and become visible.

2. **Analyzing the Options**:
- **a. Suspension**: A suspension contains larger particles that can scatter light, hence it can show the Tyndall effect effectively.
- **b. Lyophilic sol**: These colloids have a strong affinity for the solvent, leading to a more stable solution. The particles are well solvated, resulting in a smaller difference in refractive index with the medium, thus showing the Tyndall effect but not as effectively as others.
- **c. Lyophobic sol**: These colloids have little to no affinity for the solvent, resulting in poorly solvated particles. This leads to a significant difference in refractive index between the dispersed phase and the dispersion medium, making the Tyndall effect very pronounced.
- **d. True solution**: In a true solution, the solute particles are at the molecular or ionic level and do not scatter light, hence the Tyndall effect is not observed.

3. **Conclusion**:
- Among the options, the **lyophobic sol** shows the Tyndall effect most effectively due to the high difference in refractive indices between the dispersed particles and the dispersion medium.

### Final Answer:
The Tyndall effect is shown most effectively in **c. lyophobic sol**.

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