At high concentration of soap in water, soap behaves as …… .

Options

A. molecular colloid
B. associated colloid
C. macromolecular colloid
D. lyophilic colloid

Answer

To solve the question "At high concentration of soap in water, soap behaves as …", we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Soap in Water**:
- Soap is a surfactant that can dissolve in water. At low concentrations, soap molecules dissociate into ions and behave like strong electrolytes.

2. **Behavior at Low Concentration**:
- At low concentrations, soap molecules ionize and disperse in water, leading to the formation of ions that can conduct electricity.

3. **Behavior at High Concentration**:
- As the concentration of soap increases, the soap molecules begin to aggregate. This aggregation occurs because the hydrophobic (water-repelling) tails of the soap molecules seek to avoid water.

4. **Formation of Micelles**:
- At high concentrations, the soap molecules form structures known as micelles. In a micelle, the hydrophobic tails are oriented inward, away from the water, while the hydrophilic (water-attracting) heads face outward, interacting with the water.

5. **Associated Colloids**:
- The formation of micelles leads to the creation of associated colloids. This means that at high concentrations, soap behaves as an associated colloid rather than as a simple electrolyte.

6. **Conclusion**:
- Therefore, at high concentration of soap in water, soap behaves as an associated colloid.

### Final Answer:
At high concentration of soap in water, soap behaves as an **associated colloid**.

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