For the study of catalytic reactions who was awarded Noble prize

Options

A. Ostwald
B. Berzilius
C. Vant Hoff
D. Werner

Explanation

### Step-by-Step Solution:

1. **Identify the Subject of the Question**: The question asks about the Nobel Prize awarded for the study of catalytic reactions.

2. **Recall Relevant Information**: The Nobel Prize in 1909 was awarded to a scientist for his work in catalytic reactions.

3. **Identify the Scientist**: The scientist who received the Nobel Prize for his research in catalytic reactions is Wilhelm Ostwald.

4. **Provide Context**: Wilhelm Ostwald's work was significant in the field of catalysis, and he is known for the Ostwald process, which is used in the production of nitric acid (HNO3).

5. **Conclude the Answer**: Therefore, the answer to the question is Wilhelm Ostwald.

### Final Answer:
Wilhelm Ostwald was awarded the Nobel Prize in 1909 for his study of catalytic reactions.

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