Quantitative estimatin of `C,H` and extra elements (e.g., N.S.P., and halogens) is carried out by Liebig's combustion, Carius, Dumas, and Kjeldahl's method.
Q. Kjeldagl's is the name of

Options

A. A scientist
B. A round Bottom flask
C. A sealed capillary tube
D. A long necked round bottom flask

Answer

To answer the question regarding Kjeldahl's method, we need to identify what "Kjeldahl's" refers to in the context of quantitative estimation of elements. Here’s a step-by-step breakdown of the solution:

### Step-by-Step Solution:

1. **Understanding Kjeldahl's Method**:
- The Kjeldahl method is a widely used technique for determining the nitrogen content in organic compounds. It involves the digestion of the sample with concentrated sulfuric acid, which converts nitrogen into ammonium sulfate.

2. **Identifying the Equipment Used**:
- The method requires specific laboratory equipment to carry out the digestion and subsequent analysis. The primary piece of equipment used in this method is known as the Kjeldahl flask.

3. **Describing the Kjeldahl Flask**:
- The Kjeldahl flask is a type of round-bottom flask with a long neck. This design allows for efficient heating and prevents the escape of vapors during the digestion process.

4. **Conclusion**:
- Therefore, "Kjeldahl's" refers to a type of flask used in the Kjeldahl method, specifically a long-necked round-bottom flask.

### Final Answer:
Kjeldahl's is the name of a long necked round bottom flask.

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