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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 · 2021 · Paper II

Q5(d). Oxidation of 2-acetylpyridine

Question

2-Acetylpyridine is treated with SeO₂ to give X, then 50% KOH to give Y. Identify X and Y and give their mechanisms.

Answer in brief

X is pyridin-2-ylglyoxal, 2-PyCOCHO; Y is potassium 2-hydroxy-2-(pyridin-2-yl)acetate, giving the corresponding acid after acidification.

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Topic notes: aromatic substitution (electrophilic, nucleophilic) and heterocycles, with every Civil Services, IFoS and Geo-Scientist PYQ →

CoversSeO₂ oxidationRiley oxidationintramolecular Cannizzaro reactionglyoxal2-acetylpyridine

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