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

Options

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

Explanation

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

### Step 1: Understand the Nature of Soap
Soap is a substance that can act as a surfactant. It has both hydrophilic (water-attracting) and hydrophobic (water-repelling) parts. This dual nature allows soap to interact with water in unique ways.

**Hint:** Remember that soaps have two parts: one that loves water and one that hates it.

### Step 2: Concentration Effects
At low concentrations, soap behaves like a strong electrolyte, dissociating into ions in water. However, as the concentration of soap increases, it begins to exhibit different properties.

**Hint:** Consider how substances change their behavior when they are present in large amounts.

### Step 3: Formation of Micelles
At high concentrations, soap molecules aggregate to form structures known as micelles. This occurs when the concentration of soap exceeds a certain threshold known as the Critical Micelle Concentration (CMC).

**Hint:** Think about what happens when soap is added to water beyond a certain point.

### Step 4: Associated Colloids
When soap forms micelles at high concentrations, it behaves as an associated colloid. Associated colloids are substances that can form aggregates or clusters in solution, which is the case with soap.

**Hint:** Recall that associated colloids are characterized by their ability to form aggregates in solution.

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