Kjeldahl's method cannot be used to estimate nitrogen for which of the following compounds?

Which method uses an instrument called a nitrometer?

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 $Hg$ ]

$0.1 \ g$ of an organic compound was analyzed by the Kjeldahl method. The $NH_3$ produced was absorbed in $30 \ mL$ of $N/5$ $H_2SO_4$. The remaining acid required $20 \ mL$ of $N/10$ $NaOH$ for neutralization. Calculate the percentage of nitrogen in the organic compound.

Sodium fusion extract of an organic compound $(Y)$ with $CHCl_3$ and chlorine water gives a violet color to the $CHCl_3$ layer. $0.15 \ g$ of $(Y)$ gave $0.12 \ g$ of the silver halide precipitate in the Carius method. The percentage of halogen in the compound $(Y)$ is . . . . . . . (Nearest integer). (Given: molar mass $g \ mol^{-1} C : 12, H : 1, Cl : 35.5, Br : 80, I : 127$)

State whether the following statements are True or False:
$(i)$ The estimation of sulphur is detected by the weight of $BaSO_4$.
$(ii)$ $BaCl_2$ is added in the estimation of sulphur.
$(iii)$ The Carius tube is used in the estimation of sulphur.
$(iv)$ The magnesium mixture is added in the estimation of sulphur.