Differentiate between the principle of estimation of nitrogen in an organic compound by (i) Dumas method and (ii) Kjeldahl’s method.

Explanation

To differentiate between the principles of estimation of nitrogen in an organic compound by the Dumas method and the Kjeldahl method, we can break down each method step by step.

### Dumas Method

1. **Sample Preparation**: A nitrogen-containing organic compound is taken for analysis.

2. **Combustion**: The sample is heated with copper oxide (CuO) in an atmosphere of carbon dioxide (CO2). The organic nitrogen compound reacts with copper oxide.

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