Why is chemisorption referred to as activated adsorption?

Explanation

**Step-by-Step Solution:**

1. **Understanding Adsorption:**
- Adsorption is the process where molecules stick to the surface of a solid or liquid, rather than being absorbed into the bulk of the material. It involves the accumulation of molecular species at the surface.

2. **Types of Adsorption:**
- There are two main types of adsorption:
- **Physisorption:** This is a physical process where weak van der Waals forces hold the adsorbate to the surface.
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