A catalytic process in which the catalyst and the reactants are a part of the same phase is known as

Options

A. heterogeneous catalysis
B. autocatalysis
C. enzyme catalysis
D. homogeneous catalysis

Explanation

To solve the question, "A catalytic process in which the catalyst and the reactants are a part of the same phase is known as," we will analyze the options provided and determine the correct answer step by step.

### Step-by-Step Solution:

1. **Understanding Catalysis**:
- Catalysis is a process that increases the rate of a chemical reaction by adding a substance known as a catalyst. The catalyst is not consumed in the reaction and can be recovered unchanged.

2. **Identifying Types of Catalysis**:
- There are two main types of catalysis based on the phase of the catalyst relative to the reactants:
- **Homogeneous Catalysis**: The catalyst is in the same phase (solid, liquid, or gas) as the reactants and products.
- **Heterogeneous Catalysis**: The catalyst is in a different phase than the reactants and products.

3. **Analyzing the Options**:
- **Heterogeneous Catalysis**: This involves different phases (e.g., solid catalyst with gaseous reactants).
- **Autocatalysis**: In this process, one of the products acts as a catalyst for the reaction itself.
- **Enzyme Catalysis**: This refers to catalysis involving biological molecules (enzymes) but does not specify the phase.
- **Homogeneous Catalysis**: This is when the catalyst and the reactants/products are in the same phase.

4. **Conclusion**:
- Since the question specifically asks for a catalytic process where the catalyst and the reactants are in the same phase, the correct answer is **Homogeneous Catalysis**.

### Final Answer:
The correct answer is **Homogeneous Catalysis**.

---