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Indian Forest Service (Mains)

Chemistry optional

  • 2 papers
  • 200 marks each
  • 3 h per paper

Paper II covers organic chemistry and spectroscopy.

Indian Forest Service (Mains), Chemistry optional · 2022 · Paper II

Q7(d). Infrared distinctions

Question

Distinguish (i) p-aminoacetophenone and acetanilide, and (ii) phenol and cyclohexanol, using IR spectra.

Answer in brief

Use the number of N–H stretches and carbonyl type in (i), and aromatic-ring/C–O bands in (ii).

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Topic notes: IR spectroscopy: group frequencies, carbonyl stretching and hydrogen bonding, with every Civil Services, IFoS and Geo-Scientist PYQ →

CoversIR spectroscopyprimary amine vs amideamide I and amide II bandsphenol vs cyclohexanolC–O stretch

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