Verified Solution • 2025–26 Session moderate

QJEEM14Chcf31: JEE Main 2014 Chemistry - Class 11 JEEM14Chcf31 Solution: For the estimation of nitrogen, 1.4 g of organic compound was…

For the estimation of nitrogen, 1.4 g of organic compound was digested by Kjeldahl method and the evolved ammonia was absorbed in 60 mL of M/10 sulphuric acid. The unreacted acid required 20 ml of M/10 sodium hydroxide for complete neutralization. The percentage of nitrogen in the compound is:

Multiple Choice Options

  • A 3%
  • B 5%
  • C 6%
  • D 10%

Step-by-Step Verified Solution

% of N=1.4×meq.ofacidmassoforganiccompound

meq. of H2SO4=60×M10×2=12

meq. of NaOH=20×M10=2

∴ meq. of acid consumed =12−2=10

∴ % N=1.4×101.4=10%

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