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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 · 2025 · Paper II

Q7(b)(i). Checking the conjugated chromophore

Question

Calculate the UV maxima of structures I and II using Woodward–Fieser rules for dienes. [structures I and II given in the paper]

Model answer

The free solution for 2025 answers questions 1, 3, 4, 5 and 8, 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: UV spectroscopy and Woodward–Fieser rules, with every Civil Services, IFoS and Geo-Scientist PYQ →

CoversWoodward–Fieser rulesλmax of dieneshomoannular and heteroannular dieneUV spectroscopy

All parts of Question 7