Name the method for estimation of Halogen

In the Carius method of estimation of halogen, 0.15g of an organic compound gave 0.12g of AgBr. Find the peecentage of Br in the compound.

Explain any one method for the estimation of ni- trogen present in an organic compound.

In the Dumas method for the estimation of nitrogen, 0.84 g of an organic compound gave 448 ml of nitrogen at S.T.P. The percentage of nitrogen in the compound is

In the Kjeldahl's method for estimation of nitrogen in a soil sample, ammonia evolved from 0.75 g of sample neutralised 10 ml of 1 M H_(2) SO_(4) . The percentage of nitrogen in the soil is

In the Dumas method for the estimation of nitrogen, the gas collected in nitrometer is: (1)N2 (2)NH3 (3)N2+CO2 (4)CO2

Briefly explain the principle involved in Kjeldahl's method for the estimation of nitrogen.