JEE Mains · Chemistry · STD 11 - 8.3. Organic chemistry purification and characterization
For the estimation of nitrogen, \(1.4\, g\) of an organic compound was digested by Kjeldahl method and the evolved ammonia was absorbed in \(60\, mL\) of \(\frac{M}{10}\) sulphuric acid. The unreacted acid required \(20\, mL\) of \(\frac{M}{10}\) sodium hydroxide for complete neutralization. The percentage of nitrogen in the compound is .....\(\%\)
- A \(6\)
- B \(10\)
- C \(3\)
- D \(5\)
Answer & Solution
Correct Answer
(B) \(10\)
Step-by-step Solution
Detailed explanation
\(\%\) of \(N=\frac{1.4 \times \text { meq.of acid }}{\text { mass of organic compound }}\) meq. of \(H_{2} S O_{4}=60 \times \frac{M}{10} \times 2=12\) meq. of \(N a O H=20 \times \frac{M}{10}=2\) meq. of acid consumed \(=12-2=10\)…
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