Practical Organic Chemistry

' $x$ ' mg of an organic compound was analysed by Kjeldahl method. The ammonia evolved was absorbed in 50 mL of $0.5 \mathrm{M} \mathrm{H}_2 \mathrm{SO}_4$. The unused acid required 60 mL of 0.5 M NaOH solution for complete neutralisation. ...

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

Which method is used to purify liquids having very high boiling points and liquids which decompose at or below their boiling point?

A mixture of substances $A, B, C, D$ is subjected to column chromatography. The degree of adsorption is the order of $D>B>C>A$. The column is eluted with suitable solvent. Identify the correct statement with respect to separation of mixture

In Lassaigne’s test for halogens, it is
necessary to remove X and Y from the
sodium fusion extract, if nitrogen and
sulphur are present. This is done by boiling
the extract with Z. Identify X, Y and Z.