Which of the following type of catalysis can be explained by the adsorption theory ?

Options

A. Homogeneous catalysis
B. Acid base catalysis
C. Heterogeneous catalysis
D. Enzyme catalysis

Answer

To solve the question regarding which type of catalysis can be explained by the adsorption theory, we can follow these steps:

### Step 1: Understand the Types of Catalysis
Catalysis can be broadly classified into two categories:
1. **Homogeneous Catalysis** - where the catalyst is in the same phase as the reactants.
2. **Heterogeneous Catalysis** - where the catalyst is in a different phase than the reactants.

### Step 2: Define Adsorption Theory
Adsorption theory explains the mechanism of heterogeneous catalysis. In this theory, reactant molecules adhere (adsorb) to the surface of the catalyst, where they undergo a chemical reaction to form products.

### Step 3: Analyze the Steps of Heterogeneous Catalysis
According to the adsorption theory, the process of heterogeneous catalysis involves several steps:
1. **Diffusion**: Reactant molecules move towards the catalyst surface.
2. **Adsorption**: Reactants adhere to the surface of the catalyst.
3. **Reaction**: Adsorbed reactants undergo a chemical reaction to form an intermediate product.
4. **Desorption**: The product molecules detach from the catalyst surface.
5. **Diffusion**: The product molecules move away from the catalyst surface.

### Step 4: Identify the Correct Answer
Since adsorption theory specifically describes the mechanism of heterogeneous catalysis, the correct answer to the question is that **heterogeneous catalysis** can be explained by the adsorption theory.

### Final Answer
The type of catalysis that can be explained by the adsorption theory is **heterogeneous catalysis**.

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