When solvent such as alcohol and acetone are
added to hydrophilic solution

Options

A. Coagulation occurs
B. Formation of interfacial film between two layers
takes place
C. Dehydration of dispersed phase occurs
D. Negatively charged colloidal solution results

Answer

To solve the question regarding the effects of adding solvents like alcohol and acetone to a hydrophilic solution, we can break down the explanation into a step-by-step analysis.

### Step-by-Step Solution:

1. **Understanding Hydrophilic Solutions**:
- Hydrophilic solutions are those where the dispersed phase is water. These solutions are often referred to as lyophilic colloids, which means they have a strong affinity for the dispersion medium (water).

**Hint**: Remember that hydrophilic means "water-loving," indicating a strong interaction with water.

2. **Stability of Hydrophilic Solutions**:
- The stability of hydrophilic colloids is primarily due to two factors: the charge on the colloidal particles and the solvation of these particles. The solvation process involves water molecules surrounding and stabilizing the colloidal particles.

**Hint**: Think about how the presence of water molecules affects the stability of colloidal particles.

3. **Coagulation of Colloids**:
- Coagulation is the process where colloidal particles aggregate and form larger particles, often leading to precipitation. For lyophilic colloids, coagulation can occur when the stabilizing factors (charge and solvation) are disrupted.

**Hint**: Coagulation can be triggered by adding electrolytes or by changing the solvent environment.

4. **Effect of Adding Alcohol and Acetone**:
- When solvents like alcohol and acetone are added to a hydrophilic solution, they can disrupt the solvation layer around the colloidal particles. This leads to dehydration of the dispersed phase, making the particles less stable.

**Hint**: Consider how the addition of non-polar solvents (like alcohol and acetone) affects the interaction between water and colloidal particles.

5. **Resulting Phenomenon**:
- The dehydration of the dispersed phase reduces the stability of the hydrophilic colloid, which can lead to coagulation. Under these conditions, even a small amount of electrolyte can cause the particles to aggregate.

**Hint**: Focus on the relationship between dehydration and the stability of colloidal solutions.

6. **Conclusion**:
- Therefore, the correct answer to the question is that when solvents such as alcohol and acetone are added to a hydrophilic solution, dehydration of the dispersed phase occurs.

**Hint**: Summarize the key points about the effects of adding solvents on the stability of hydrophilic colloids.

### Final Answer:
When solvents such as alcohol and acetone are added to a hydrophilic solution, dehydration of the dispersed phase occurs.