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 solve the question regarding the changes associated with the process of imbibition, we can follow these steps:

### Step-by-Step Solution:

1. **Understand Imbibition**: Imbibition is a special type of diffusion where water is absorbed by colloidal substances. This process is crucial for seeds and dry wood to absorb water and swell.

2. **Identify Changes Associated with Imbibition**: The changes that occur during imbibition include:
- **Volume Changes**: The volume of the material increases as it absorbs water.
- **Development of Pressure**: As the water is absorbed, it creates internal pressure within the material.
- **Release of Heat**: The process of imbibition can also release heat as water is absorbed.

3. **Identify the Exception**: The question asks for a change that is NOT associated with imbibition. Among the changes listed, pH changes are not typically associated with the imbibition process.

4. **Conclusion**: Based on the understanding of imbibition and the associated changes, we conclude that the correct answer is the option that mentions pH changes.

### Final Answer:
The change that is not associated with the process of imbibition is **pH changes**.

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