Q14 / 75 · JEE Main 2020 (08 Jan Shift 2) · Chemistry

Kjeldahl’s method cannot be used to estimate nitrogen for which of the following compounds?

A
$C_{6} H_{5} N H_{2}$
B
$C H_{3} C H_{2} - C \equiv N$
Correct answer
C
$C_{6} H_{5} N O_{2}$
D

Solution

Kjeldahl method is not applicable to nitro or diazo groups present in the ring, as nitrogen atom can't be converted to ammonium sulphate under the reaction conditions.

Hence, the correct answer is option: 'C'.

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