NEETChemistryGeneral Organic Chemistry
Differentiate between the principle of estimation of nitrogen in an organic compound by (i) Dumas method and (ii) Kjeldahl’s method.
Options
- ADumas method and Kjeldahls method are not applicable for estimation of nitrogen in organic compounds
- BIn the Dumas method, the organic compound is heated in a combustion tube with copper oxide (CuO) to convert al
- CBoth the Dumas and Kjeldahl's methods involve heating the organic compound to convert nitrogen into nitrogen o
- DThe Dumas method relies on the decomposition of the organic compound in the presence of a catalyst to release
Correct answer
B. In the Dumas method, the organic compound is heated in a combustion tube with copper oxide (CuO) to convert al
Step-by-step solution
Correct Option is : (B) In the Dumas method, the organic compound is heated in a combustion tube with copper oxide (CuO) to convert all nitrogen to nitrogen gas (N 2 ), which is collected and measured. In Kjeldahl's method, the organic compound is digested with concentrated sulphuric acid (H 2 SO 4 ), converting the nitrogen to ammonium sulphate (NH 4 ) 2 SO 4 .The liberated ammonia (NH 3 ) is then titrated with a standardized acid.