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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 · 2023 · Paper II

Q8(e). Identification of glutaric anhydride

Question

Assign C₅H₆O₃: MS m/z 114, 76, 73, 60, 55; IR 2981, 1850, 1758, 1250 cm⁻¹; ¹H NMR δ 2.43 (t, 4H), 1.96 (pentet, 2H); ¹³C NMR 177, 33, 19.6 ppm.

Model answer

The free solution for 2023 answers questions 1, 2, 5, 6 and 7, the ones picked in its time plan. This part is not answered on the site yet. New answers are announced on Telegram.

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Topic notes: structure from combined IR, NMR and mass spectra, with every Civil Services, IFoS and Geo-Scientist PYQ →

Coversglutaric anhydridestructure elucidationanhydride IR doublet¹³C NMRcombined spectroscopy

All parts of Question 8