The element whose percentage composition in an organic compound can be determined by the Carius method is

In the quantitative estimation of sulfur in an organic compound,the amount of sulfur is determined in the form of which substance?

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

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

During $S$ estimation,$160 \ mg$ of an organic compound gives $466 \ mg$ of barium sulphate. The percentage of Sulphur in the given compound is . . . . . . $\%.$ (Given molar mass in $g \ mol^{-1}$ of $Ba: 137, S: 32, O: 16$)

Why is a solution of potassium hydroxide used to absorb carbon dioxide evolved during the estimation of carbon present in an organic compound?