Compared to common colloidal sols milcells have:

Options

A. Higher colligative properties
B. Lower colligative properties
C. Same colligative properties
D. None is ture

Answer

To solve the question "Compared to common colloidal sols, micelles have:", we need to analyze the properties of micelles in comparison to common colloidal solutions, particularly focusing on their colligative properties.

### Step-by-Step Solution:

1. **Understanding Colligative Properties**:
- Colligative properties depend on the number of solute particles in a solution, not on the nature of the solute. These properties include boiling point elevation, freezing point depression, vapor pressure lowering, and osmotic pressure.

**Hint**: Remember that colligative properties are influenced by the number of particles in solution.

2. **Defining Common Colloidal Solutions**:
- Common colloidal solutions consist of particles that range in size from 1 nanometer to 1000 nanometers. These particles are typically dispersed in a continuous phase (solvent).

**Hint**: Think about the size range of particles in colloidal solutions.

3. **Understanding Micelles**:
- Micelles are formed when surfactant molecules aggregate in a solution, typically when the concentration exceeds a certain threshold known as the critical micelle concentration (CMC). Micelles can also fall within the size range of 1 nanometer to 1000 nanometers but are generally larger due to the aggregation of multiple surfactant molecules.

**Hint**: Consider how micelles are formed and their structure compared to individual colloidal particles.

4. **Comparing the Number of Solute Particles**:
- In a common colloidal solution, the number of solute particles is generally higher than in a micellar solution because micelles consist of aggregated particles. Therefore, the effective number of solute particles contributing to colligative properties is lower in micelles.

**Hint**: Focus on how aggregation affects the number of effective solute particles.

5. **Conclusion on Colligative Properties**:
- Since colligative properties depend on the number of solute particles, and micelles have fewer effective solute particles compared to common colloidal solutions, micelles will exhibit lower colligative properties.

**Hint**: Relate the number of solute particles to the strength of colligative properties.

6. **Final Answer**:
- Therefore, compared to common colloidal sols, micelles have lower colligative properties. The correct option is **Option 2: lower colligative property**.

### Summary:
- Common colloidal solutions have a higher number of solute particles compared to micelles, leading to greater colligative properties. Thus, micelles exhibit lower colligative properties than common colloidal solutions.