What is the use of `CuSO_4` in kjeledahl's method ?

Options

A. Hydrolysing agent
B. Reducing agent
C. Oxidising agent
D. Catalytic agent

Answer

### Step-by-Step Solution:

1. **Understanding Kjeldahl's Method**:
- Kjeldahl's method is a quantitative analytical procedure used to determine the nitrogen content in organic compounds. It is particularly useful for analyzing proteins and other nitrogen-containing substances.

2. **Role of Copper Sulfate (CuSO₄)**:
- In the Kjeldahl method, organic compounds containing nitrogen are treated with concentrated sulfuric acid (H₂SO₄). During this process, the nitrogen in the organic compounds is converted into ammonium sulfate (NH₄)₂SO₄.

3. **Function of CuSO₄**:
- Copper sulfate (CuSO₄) acts as a catalyst in this reaction. A catalyst is a substance that increases the rate of a chemical reaction without being consumed in the process. In the Kjeldahl method, CuSO₄ helps to facilitate the breakdown of the organic nitrogen compounds, making the reaction more efficient.

4. **Conclusion**:
- Therefore, the use of CuSO₄ in Kjeldahl's method is primarily as a catalytic agent that aids in the decomposition of nitrogen-containing organic compounds during the digestion process with sulfuric acid.

### Final Answer:
The use of `CuSO₄` in Kjeldahl's method is as a catalytic agent that facilitates the decomposition of nitrogen-containing organic compounds during the reaction with concentrated sulfuric acid.

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