The percentage of nitrogen in a compound is determined by

Options

A. Nessler's mathod
B. Kjeldahl's method
C. Carius method
D. taking the difference between total percentage and the sum of percentage of all other elements present.

Answer

To determine the percentage of nitrogen in a compound, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Methods Available**:
- There are several methods to determine the percentage of nitrogen in a compound, including the Nessler method, Zydor method, Carrier's method, and the difference method.

2. **Evaluate Each Method**:
- **Nessler Method**: This method is primarily used for the determination of ammonia, not directly for nitrogen in compounds.
- **Zydor Method**: This method is specifically designed to determine the percentage of nitrogen in a sample. The formula used is \(1.4 \times N \times V\), where \(N\) is the normality, \(V\) is the volume, and the weight of the substance is also considered.
- **Carrier's Method**: This method is used for the determination of sulfur in compounds, not nitrogen.
- **Taking the Difference**: This method involves calculating the total percentage of elements and subtracting the sum of the percentages of all other elements. However, this is not a direct method for determining nitrogen.

3. **Identify the Correct Method**:
- After evaluating all the methods, the Zydor method stands out as the correct method for determining the percentage of nitrogen in a compound.

4. **Conclusion**:
- Therefore, the percentage of nitrogen in a compound is determined by the **Zydor method**.

### Final Answer:
The percentage of nitrogen in a compound is determined by the **Zydor method**.

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