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

Gujarat BoardEnglish MediumSTD 11 ScienceChemistry8.3. Organic chemistry purification and characterization1 Mark
MCQ
Kjeldahl's method is used in the estimation of 
  • ✓
    Nitrogen
  • B
    Halogens
  • C
    Sulphur
  • D
    Carbon
✓

Answer

Correct option: A.
Nitrogen
a
Kjeldahl's method is used for the estimation of nitrogen. The organic compound is heated with conc. $H _2 SO_4$ in the presence $K _2 SO _4$ and a little $CuSO _4$ to convert all the nitrogen into $\left( NH _4\right) 2 SO _4 \cdot K _2 SO _4$ raises the boiling point of $H _2 SO _4$ while $CuSO _4$ catalyzes the reaction.

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