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STD 11 - 8.3. Organic chemistry purification and characterization — NEET STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceNEETSTD 11 - 8.3. Organic chemistry purification and characterization4 Marks
MCQ
While estimating the nitrogen present in an organic compound by Kjeldahl's method, the ammonia evolved from $0.25\,g$ of the compound neutralized $2.5\,mL$ of $2\,M\,H _{2} SO _{4}$. The percentage of nitrogen present in organic compound is $......$
  • A
    $55$
  • ✓
    $56$
  • C
    $54$
  • D
    $53$
✓

Answer

Correct option: B.
$56$
b
$\% N =\frac{1.4\left( N _{1} V _{1}\right)}{\text { mass of organic compound }}$

$\% N =\frac{1.4(2.5 \times 2 \times 2)}{0.25}=56$

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