peptization involves :

Options

A. precipitation of colloidal particles
B. disintegration of colloidal aggregates
C. purifiction of colloids
D. impact of molecules of the dispersion medium on the colloidal particles

Answer

To solve the question regarding what peptization involves, we can break down the process step by step:

### Step-by-Step Solution:

1. **Understanding Peptization**:
- Peptization is a process that involves the transformation of a precipitate into a colloidal solution. This occurs when a freshly prepared precipitate is treated with a suitable electrolyte.

2. **Analyzing the Options**:
- **Option 1**: Precipitation of colloidal particles - This is not correct as peptization involves the opposite process, where a precipitate is converted into a colloidal form.
- **Option 2**: Disintegration of colloidal aggregates - This is a strong candidate as it aligns with the definition of peptization, where aggregates break down into smaller colloidal particles.
- **Option 3**: Purification of colloids - This does not accurately describe peptization, as the process is not primarily about purification.
- **Option 4**: Impacts of molecules of the dispersant medium on the colloidal particles - While this may occur during the process, it does not define peptization itself.

3. **Selecting the Correct Answer**:
- Based on the analysis, **Option 2: Disintegration of colloidal aggregates** is the correct answer, as it directly relates to the process of peptization.

### Final Answer:
Peptization involves the **disintegration of colloidal aggregates** (Option 2).