Question

Which of the following method/s is/are used in the estimation of nitrogen in organic compounds?
(i) Carius method
(ii) Dumas method
(iii) Silver salt method
(iv) Kjeldhal method}

• A. (i) only
• B. (ii) and (iii)
• C. (iii) and (iv)
• D. (ii) and (iv)
• E. (i) and (iii)

Hint:

Remember: \[ \text{Nitrogen} \rightarrow \text{Dumas, Kjeldahl} \] \[ \text{Halogens/Sulfur} \rightarrow \text{Carius} \]

Answer 1

The Correct Option is D

Nitrogen estimation in organic compounds is done by:

• Dumas method
• Kjeldahl method

Carius method is used for halogens and sulfur estimation. Therefore, the correct pair is: \[ (ii)\ \text{and}\ (iv) \]
Hence, the correct answer is: \[ \boxed{(D)} \]