Micelles formation takes place

Options

A. below kraft temperature
B. above kraft temperature
C. below critical micells concentration
D. have no relation with kraft temperature

Answer

**Step-by-Step Solution:**

1. **Understanding Micelles**: Micelles are aggregates formed by certain substances, particularly surfactants, when they reach a specific concentration and temperature. They are part of a category known as associated colloids.

2. **Conditions for Micelle Formation**: Micelles form under two specific conditions:
- **Critical Micelle Concentration (CMC)**: This is the minimum concentration of surfactants needed to form micelles. Below this concentration, surfactants behave like normal strong electrolytes and do not form micelles.
- **Kraft Temperature (TK)**: This is the minimum temperature above which micelles start to form. Below this temperature, micelles do not form, regardless of the concentration.

3. **Analyzing the Options**:
- **Option 1**: "Micelle formation takes place below the Kraft temperature." This is incorrect because micelles do not form below this temperature.
- **Option 2**: "Micelle formation takes place above the Kraft temperature." This is correct, as micelles can only form above this temperature.
- **Option 3**: "Micelle formation takes place below critical micelle concentration." This is incorrect because micelles cannot form below this concentration.
- **Option 4**: "Micelle formation has no relation with Kraft temperature." This is incorrect since micelle formation is directly related to the Kraft temperature.

4. **Conclusion**: The only correct option is **Option 2**, which states that micelle formation takes place above the Kraft temperature.

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