In the estimation of nitrogen,$0.3 \ g$ of an organic compound was digested,and the evolved ammonia was passed into $100 \ mL$ of $0.1 \ M \ H_2SO_4$. The excess acid required $20 \ mL$ of $0.5 \ M \ NaOH$ for complete neutralization. What is the organic compound?

An organic compound is subjected to chlorination to get compound $A$. When $0.5 \ g$ of compound $A$ is reacted with $AgNO_3$ [Carius Method],it forms $0.3849 \ g$ of $AgCl$. Calculate the percentage of chlorine in compound $A$. (Round off to the nearest integer)
(Atomic masses of $Ag$ and $Cl$ are $107.87$ and $35.5$ respectively)

$29.5 \ mg$ of an organic compound containing nitrogen was digested according to Kjeldahl's method and the evolved ammonia was absorbed in $20 \ mL$ of $0.1 \ M \ HCl$ solution. The excess of the acid required $15 \ mL$ of $0.1 \ M \ NaOH$ solution for complete neutralization. The percentage of nitrogen in the compound is $..... \%$.

Describe the principle and reactions involved in the estimation of oxygen in an organic compound.

In Duma's method of estimation of nitrogen,$0.1840 \, g$ of an organic compound gave $30 \, mL$ of nitrogen collected at $287 \, K$ and $758 \, mm$ of $Hg$ pressure. The percentage composition of nitrogen in the compound is $......$ . (Round off to the Nearest Integer). [Given : Aqueous tension at $287 \, K = 14 \, mm$ of $Hg$ ]

Kjeldahl's method was used for the estimation of nitrogen in an organic compound. The ammonia evolved from $0.55 \ g$ of the compound neutralized $12.5 \ mL$ of $1 \ M \ H_2SO_4$ solution. The percentage of nitrogen in the compound is $.....$ (Nearest integer).