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Q.
Which of the following compounds will be suitable for Kjeldahl's method for nitrogen estimation?
JEE MainJEE Main 2018Organic Chemistry – Some Basic Principles and Techniques
Solution:
Kjeldahl method is not applicable for compounds containing nitrogen in nitro, and azo groups and nitrogen in ring, as $N$ of these compounds does not change to ammonium sulphate under these conditions. Hence only aniline can be used for estimation of nitrogen by Kjeldahl's method.