Which of the following will show Tyndall effect?

Options

A. Starch solution
B. Sodium chloride solution
C. Copper sulphate solution
D. Sugar solution

Explanation

To determine which of the following will show the Tyndall effect, we need to understand what the Tyndall effect is and the types of mixtures that exhibit this phenomenon.

### Step-by-Step Solution:

1. **Understanding the Tyndall Effect**:
- The Tyndall effect is the scattering of light by particles in a colloid or in very fine suspensions. It occurs when light passes through a colloidal solution, which contains larger particles that can scatter the light.

2. **Identifying Types of Mixtures**:
- Mixtures can be classified into two main categories:
- **Homogeneous Mixtures (True Solutions)**: In these mixtures, the particles are uniformly distributed and do not scatter light. Examples include salt solutions, sugar solutions, and copper sulfate solutions.
- **Heterogeneous Mixtures (Colloidal Solutions)**: In these mixtures, the particles are not uniformly distributed, and they can scatter light, thus showing the Tyndall effect. An example is starch solution.

3. **Analyzing the Options**:
- **Option 1: Starch Solution**: This is a colloidal solution. Since it contains larger particles that can scatter light, it will show the Tyndall effect.
- **Option 2: Sodium Chloride Solution**: This is a true solution where the particles are uniformly distributed. It will not show the Tyndall effect.
- **Option 3: Copper Sulfate Solution**: This is also a true solution with uniformly distributed particles. It will not show the Tyndall effect.
- **Option 4: Sugar Solution**: Similar to the previous two, this is a true solution with uniformly distributed particles and will not show the Tyndall effect.

4. **Conclusion**:
- Based on the analysis, only the starch solution (Option 1) will show the Tyndall effect. The other options (sodium chloride solution, copper sulfate solution, and sugar solution) will not show the Tyndall effect as they are true solutions.

### Final Answer:
**The correct option that shows the Tyndall effect is Option 1: Starch Solution.**

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