Sorption is the term used when

Options

A. Adsorption takes place
B. absorption take place
C. both take place
D. desorption takes place

Answer

To solve the question "Sorption is the term used when," we need to analyze the options provided and understand the definitions of the terms involved.

### Step-by-Step Solution:

1. **Understanding Sorption**:
- Sorption is a general term that encompasses both adsorption and absorption. It refers to the process by which one substance becomes attached to another.

2. **Definitions**:
- **Adsorption**: This is the process where molecules adhere to the surface of a solid or liquid. The concentration of the adsorbate is higher at the surface than in the bulk.
- **Absorption**: This is the process where a substance is taken up into the bulk of another substance, leading to a uniform distribution throughout.

3. **Analyzing the Options**:
- **Option A: Adsorption takes place**: This is incorrect because sorption includes both processes, not just adsorption.
- **Option B: Absorption takes place**: This is also incorrect for the same reason; sorption is not limited to absorption alone.
- **Option C: Both take place**: This is correct. Sorption involves both adsorption and absorption processes.
- **Option D: Desorption takes place**: This is incorrect as desorption refers to the process of a substance being released from a surface, which is not what sorption describes.

4. **Conclusion**:
- The correct answer is **Option C: Both take place**. Sorption is the term used when both adsorption and absorption occur simultaneously.

### Final Answer:
Sorption is the term used when both adsorption and absorption take place.

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