In a Carius tube,an organic compound '$X$' is treated with sodium peroxide to form a mineral acid '$Y$'. The solution of $BaCl_2$ is added to '$Y$' to form a precipitate '$Z$'. '$Z$' is used for the quantitative estimation of an extra element. '$X$' could be:

$29.5 \, mg$ 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 acid required $15 \, mL$ of $0.1 \, M \, NaOH$ solution for complete neutralization. What is the percentage of nitrogen in the compound?

Differentiate between the principle of estimation of nitrogen in an organic compound by $(i)$ Dumas method and $(ii)$ Kjeldahl's method.

Which method is used for the estimation of nitrogen in an organic compound?

When $0.15 \ g$ of an organic compound was analyzed using the Carius method for the estimation of bromine,$0.2397 \ g$ of $AgBr$ was obtained. The percentage of bromine in the organic compound is $.....$ (Nearest integer).
[Atomic mass: Silver $= 108$,Bromine $= 80$]

In the Carius method for the estimation of halogens,$0.15 \, g$ of an organic compound gave $0.12 \, g$ of $AgBr$. Find the percentage of bromine in the compound. (in $\%$)