The right option for the statement "Tyndall effect is exhibited by" is:

Options

A. Starch solution
B. Urea solution
C. NaCl solution
D. Glucose solution

Answer

To determine which solution exhibits the Tyndall effect, we need to understand what the Tyndall effect is and the nature of the solutions provided in the options.

### Step-by-Step Solution:

1. **Understanding the Tyndall Effect**:
- The Tyndall effect is the scattering of light by particles in a colloid or fine suspension. It occurs when a beam of light passes through a colloidal solution, causing the light to scatter and become visible.

**Hint**: Remember that the Tyndall effect is indicative of the presence of colloidal particles in a solution.

2. **Identifying the Nature of Each Solution**:
- **Starch Solution**: Starch is a polysaccharide that forms a colloidal solution when dissolved in water. Therefore, it can scatter light and will exhibit the Tyndall effect.
- **Urea Solution**: Urea is a small molecule that dissolves completely in water, forming a clear solution. It does not contain colloidal particles, so it will not exhibit the Tyndall effect.
- **NACL Solution**: Sodium chloride (NaCl) also dissolves completely in water, forming a clear and homogeneous solution without colloidal particles. Thus, it will not exhibit the Tyndall effect.
- **Glucose Solution**: Glucose is another small molecule that dissolves in water to form a clear solution. It does not contain colloidal particles and will not exhibit the Tyndall effect.

**Hint**: Classify each solution based on whether it contains colloidal particles or not.

3. **Conclusion**:
- Among the given options, only the starch solution is a colloidal solution and will exhibit the Tyndall effect. The other solutions (urea, NaCl, and glucose) are clear and homogeneous, lacking the necessary colloidal particles to scatter light.

**Final Answer**: The right option for the statement "Tyndall effect is exhibited by" is **Starch solution**.