NEET2013ChemistryGeneral Organic ChemistryActual
During estimation of nitrogen in the organic compound by Kjeldahl's method, the ammonia evolved from 0.5 g of the compound in Kjeldahl's estimation of nitrogen, neutralised 10 mL of 1 M H ₂ SO ₄ . Find out the percentage of nitrogen in the compound.
Options
- A14 %
- B28 %
- C56 %
- D68 %
Correct answer
C. 56 %
Step-by-step solution
1 M of 10 mLH ₂ SO ₄=1 M of 20 mLNH ₃ 1000 mL of 1 M ammonia contains =14 ~g nitrogen 20 mL of 1 M NH ₃ contains 20 mL of 1 M NH ₃ contains = 14 20 1000 ~g nitrogen % age of nitrogen = 14 20 100 1000 0.5 =56.0 %