Home › MCQs › EEJ MAIN Chemistry › Question #7196
Back to Questions
EEJ MAIN Chemistry QUESTION #7196
Question 1
In Kjeldahl's method for the estimation of nitrogen, the nitrogen present in the organic compound is quantitatively converted into which of the following substances?
  • $N_{2}$ gas
  • $NH_{3}$
  • $(NH_{4})_{2}SO_{4}$✔️
  • $NO_{2}$
Correct Answer Explanation

In the first step of Kjeldahl's method, the organic compound is heated with concentrated $H_{2}SO_{4}$.

  • The nitrogen in the compound is converted into Ammonium Sulfate ($(NH_{4})_{2}SO_{4}$) [cite: 3, 48].
  • This is later treated with $NaOH$ to release ammonia gas for titration[cite: 29].