How is nitrogen estimated by Kjeldahl's method

The hetero elements in organic compound are nitrogen, halogen, sulphur and phosphorousd, Nitrogen is estimated by Duma's method (or) Kjeldahl's method. The other hetero elements are estimated using Carius method. The substance used in the estimation of phosphorous is

The hetero elements in organic compound are nitrogen, halogen, sulphur and phosphorousd, Nitrogen is estimated by Duma's method (or) Kjeldahl's method. The other hetero elements are estimated using Carius method. In the estimation of halogen by Carius method, which of the following is carried out

The hetero elements in organic compound are nitrogen, halogen, sulphur and phosphorousd, Nitrogen is estimated by Duma's method (or) Kjeldahl's method. The other hetero elements are estimated using Carius method. 0.25 g of an organic compound gave 22.4 ml. of N_(2) at STP by Duma's method. The percentage of Nitrogen in the compound is

0.303 g fo sample was analysed for nitrogen by Kjeldahl's method. The ammonia gas evolved was absorbed in 50 ml of 0.05 M H_(2)SO_(4) . The excess acid required 25 ml of 0.1 M NaOH for neutralisation.

In the estimation of nitrogen by Kjeldahl's method, 2.8 gm of an organic compound required 20 millimole of H_(2)SO_(4) for the complete neutralization of NH_(3) gas evolved. The percentage of nitrogen in the sample is: