Nitrogen present in an unknown organic compound was estimated by the Dumas method to be $17.7 \%$ by weight. The compound is very likely to be ....

In the estimation of bromine,$0.5 \ g$ of an organic compound gave $0.40 \ g$ of silver bromide. The percentage of bromine in the given compound is $..... \ \%$ (nearest integer).
(Relative atomic masses of $Ag$ and $Br$ are $108 \ u$ and $80 \ u$,respectively).

In the $Kjeldahl$ method,when an organic compound containing nitrogen is heated with concentrated $H_2SO_4$,nitrogen is converted into which of the following?

In Carius method for estimation of halogens,$0.2 \, g$ of an organic compound gave $0.188 \, g$ of $AgBr$. The percentage of bromine in the compound is $......$ . (Nearest integer)
[Atomic mass: $Ag=108, Br=80$ ]

Dumas method involves the determination of nitrogen content in the organic compound in the form of

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 $\%$)