Which of the following statements is not applicable to chemisorption

Options

A. It is slow
B. It is irreversible
C. It is highly specific
D. It is independent of temperature

Explanation

To determine which statement is not applicable to chemisorption, let's analyze each statement one by one:

1. **Chemisorption is slow.**
- This statement is true. Chemisorption involves the formation of chemical bonds between the adsorbate and the surface, which is a slower process compared to physisorption (physical adsorption).

2. **Chemisorption is irreversible.**
- This statement is also true. Once a chemical bond is formed during chemisorption, it is generally irreversible under normal conditions, meaning the adsorbate cannot easily detach from the surface.

3. **Chemisorption is highly specific.**
- This statement is true as well. Chemisorption is specific because it involves the formation of specific chemical bonds between particular molecules and the surface, making it selective.

4. **Chemisorption is independent of temperature.**
- This statement is false. Chemisorption is not independent of temperature; in fact, it is affected by temperature changes. Initially, as temperature increases, the rate of chemisorption may increase due to higher kinetic energy, but at very high temperatures, desorption may occur, leading to a decrease in the amount of adsorbed species.

**Conclusion:**
The statement that is not applicable to chemisorption is: **"Chemisorption is independent of temperature."**

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