11 grade chemistry others> Kjeldahl’s method cannot be used to estim...
Kjeldahl’s method cannot be used to estimate nitrogen for which of the following compounds.
A. C6H5NH2
B. NH2−CO−NH2
C. C6H5NO2
D. CH3CH2−C≡N
1 AnswersKjeldahl's method is primarily used to estimate nitrogen content in organic compounds, particularly those that can be converted into ammonia (NH₃). Let's analyze the compounds:
A. C₆H₅NH₂ (aniline) - This compound contains nitrogen and can be estimated using Kjeldahl's method.
B. NH₂−CO−NH₂ (urea) - This compound is a typical example used in Kjeldahl's method for nitrogen estimation.
C. C₆H₅NO₂ (nitrobenzene) - This compound contains nitrogen but cannot be estimated using Kjeldahl's method because it does not readily convert to ammonia.
D. CH₃CH₂−C≡N (propionitrile) - This compound contains nitrogen and can be estimated using Kjeldahl's method.
So, the correct answer is C. C₆H₅NO₂.
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