A catalyst in the finely divided form is most effective because :

Options

A. less surface area is available
B. more active sites are formed
C. more energy gets stored in the catalyst
D. none of these

Answer

To solve the question, "A catalyst in the finely divided form is most effective because:", we need to analyze the options provided and understand the role of surface area in catalysis.

### Step-by-Step Solution:

1. **Understanding Catalysts**: A catalyst is a substance that increases the rate of a chemical reaction without being consumed in the process. Its effectiveness often depends on its surface area.

2. **Analyzing the Options**:
- **Less surface area is available**: This option is incorrect. A catalyst with less surface area would have fewer active sites for the reaction to occur.
- **More active sites are formed**: This option suggests that a finely divided catalyst has a greater surface area, leading to more active sites. This is a strong contender.
- **More energy gets stored in the catalyst**: This option is misleading. Catalysts do not store energy; they provide an alternative pathway for the reaction with a lower activation energy.
- **None of these**: This option is incorrect since we have identified a valid reason.

3. **Conclusion**: The most effective catalyst is in a finely divided form because it has a larger surface area, which allows for more active sites to be available for the reaction. Therefore, the correct answer is: **more active sites are formed**.

### Final Answer:
The correct answer is: **more active sites are formed**.

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