Which of the following does not behaves as a surfactant ?

Options

A. Soap
B. Detergent
C. Phospholipid
D. Triglycerides

Answer

To determine which of the following substances does not behave as a surfactant, we need to analyze the properties of each option provided.

### Step-by-Step Solution:

1. **Understanding Surfactants**:
- Surfactants, or surface-active agents, are compounds that lower the surface tension between two substances, such as between a liquid and a solid or between two liquids. They are commonly used in soaps and detergents for their cleansing properties.

2. **Identifying Common Surfactants**:
- **Soaps**: These are sodium or potassium salts of long-chain fatty acids. They are well-known surfactants due to their ability to emulsify oils and fats in water.
- **Detergents**: These are synthetic surfactants that are more effective than soaps, often having a structure like RSO4-Na+. They also have excellent cleansing properties.
- **Phospholipids**: These are molecules that contain fatty acid chains and are known for their surfactant properties. An example is phosphatidylcholine (PC), which is a common phospholipid.

3. **Analyzing Triglycerides**:
- **Triglycerides**: These are a type of fat found in the blood, composed of glycerol and three fatty acids. They serve as a form of energy storage in the body and are not used for surfactant purposes. High levels of triglycerides can lead to health issues, but they do not exhibit surfactant properties.

4. **Conclusion**:
- Based on the analysis, triglycerides do not behave as surfactants, while soaps, detergents, and phospholipids do.

### Final Answer:
The substance that does not behave as a surfactant is **Triglycerides**.

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