Question
Chemistry Question on Methods Of Purification Of Organic Compounds
For which of the following compounds Kjeldahl method can be used to determine the percentage of Nitrogen ?
A
Nitrobenzene
B
Pyridine
C
Alanine
D
Diazomethane
Answer
Alanine
Explanation
Solution
Kjeldahl?s method is not applicable for compounds containing nitrogen in nitro and azo groups and nitrogen present in the ring. Because nitrogen of these compounds does not change to ammonium sulphate under these conditions.
Hence only Alanine can be used to determine percentage of nitrogen.