Fill in the blanks:
$(1)$ .......... gas is produced in Kjeldahl's method and absorbed in ...........
$(2)$ The excess $H_2SO_4$ is added in Kjeldahl's method and then the remaining $H_2SO_4$ is titrated with a calculated ..........

When $1 \ g$ of compound $(X)$ is subjected to Kjeldahl's method for the estimation of nitrogen, $15 \ mL$ of $1 \ M$ $H_2SO_4$ was neutralized by the ammonia evolved. The percentage of nitrogen in compound $(X)$ is:

An organic compound gives $0.220 \ g$ of $CO_2$ and $0.126 \ g$ of $H_2O$ on complete combustion. If the $\%$ of carbon is $24$,then the $\%$ of hydrogen is $...... \times 10^{-1}$. $(Nearest \ integer)$

Which compound is formed by heating with nitric acid in the estimation of phosphorus in the Carius method?

Consider the following reaction. On estimation of bromine in $1.00 \ g$ of $R$ using Carius method,the amount of $AgBr$ formed (in $g$) is . . . .
$\overline{[Given :}$ Atomic mass of $H = 1, C = 12, O = 16, P = 31, Br = 80, Ag = 108]$

Describe the Kjeldahl's method and the principles for the estimation of nitrogen present in an organic compound.