Physiosorption occurs because of____ forces.

Explanation

To answer the question "Physiosorption occurs because of____ forces," we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Physiosorption**:
- Physiosorption is a type of adsorption where molecules (adsorbates) adhere to a surface (adsorbent) through weak interactions.

2. **Identifying the Forces Involved**:
- The key to understanding physiosorption lies in the nature of the forces that hold the adsorbate to the adsorbent.

3. **Types of Forces**:
- The forces that are primarily responsible for physiosorption are weak intermolecular forces.

4. **Specific Type of Forces**:
- These weak intermolecular forces are known as Van der Waals forces. They include attractions such as dipole-dipole interactions, dipole-induced dipole interactions, and London dispersion forces.

5. **Conclusion**:
- Therefore, we can conclude that physiosorption occurs because of Van der Waals forces.

### Final Answer:
Physiosorption occurs because of **Van der Waals forces**.