Which of the following is not a change associated with process of imbibition?

Options

A. Volume changes
B. Development of pressure
C. Release of heat
D. pH changes

Explanation

To answer the question "Which of the following is not a change associated with the process of imbibition?", we need to analyze the options provided: volume changes, development of pressure, release of heat, and pH changes.

### Step-by-Step Solution:

1. **Understanding Imbibition**:
- Imbibition is a special type of diffusion where water is absorbed by solids, particularly colloids. This process leads to an increase in the volume of the absorbing material.

2. **Analyzing Volume Changes**:
- When water is absorbed, the volume of the solid (like seeds or dry wood) increases. Thus, volume changes are associated with imbibition.

3. **Considering Development of Pressure**:
- As the solid absorbs water and swells, it generates internal pressure. Therefore, the development of pressure is also a change associated with imbibition.

4. **Evaluating Release of Heat**:
- The process of imbibition can involve the release of heat as the water is absorbed. This means that heat release is a change associated with imbibition.

5. **Assessing pH Changes**:
- Imbibition primarily involves the physical absorption of water and does not typically alter the pH of the absorbing material. Therefore, pH changes are not associated with the process of imbibition.

6. **Conclusion**:
- Among the options provided, the change that is **not** associated with the process of imbibition is **pH changes**.

### Final Answer:
**pH changes** are not a change associated with the process of imbibition.

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