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Nitrogen can be estimated by Kjeldahl's ...

Nitrogen can be estimated by Kjeldahl's method for which of the following compound ?

A

B

C

D

Text Solution

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The correct Answer is:
B
Kjeldahl's method for nitrogen estimation is not applicable to nitro compounds such as nitrobenzene and compounds containing nitrogens in the ring such as pyridine, since during digestion, there are not completely converted into `(NH_(4))_(2)SO_(4)`. Furthermore, diazonium salts lose `N_(2)` on heating during digestion. Thus, Kjeldahl's method for nitrogen estimation is only applicable to aniline, i.e, option (b) is correct.
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