Indian Forest Service (Mains)
Chemistry optional
- 2 papers
- 200 marks each
- 3 h per paper
Paper II covers organic chemistry and spectroscopy.
All years

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Paper II, organic chemistry and spectroscopy
Solution, 2025
Indian Forest Service (Mains), Chemistry optional. 30 pages. Questions 1, 3, 4, 5 and 8 are answered.
Every question of 2025, one page each44 parts in 8 questions, with the question as text and the key points of its answer
Question 1 40 marks
- 1(a)Aromaticity of small rings5 marks
- 1(b)Nitrene transfer to an alkene5 marks
- 1(c)Electrophilic substitution of heteroarenes5 marks
- 1(d)Elimination next to an existing alkene5 marks
- 1(e)Oxymercuration of norbornene5 marks
- 1(f)Medium-dependent pinacol rearrangement5 marks
- 1(g)Two thermal electrocyclic steps5 marks
- 1(h)Intramolecular Claisen condensation5 marks
Question 2 40 marks
Question 3 40 marks
Question 4 40 marks
Question 5 40 marks
Question 6 40 marks
- 6(a)(i)Photodecarbonylation of thujone5 marks
- 6(a)(ii)Photochemistry of an amino ketone5 marks
- 6(a)(iii)Di-pi-methane rearrangement5 marks
- 6(b)(i)Two ester NMR patterns5 marks
- 6(b)(ii)A symmetric malonate ester5 marks
- 6(c)(i)Number- and weight-average molar masses10 marks
- 6(c)(ii)Syn and anti dihydroxylation5 marks
Question 7 40 marks





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Model answer pages open with the VKC plan.
Model answer pages open with the VKC plan.
Model answer pages open with the VKC plan.
Model answer pages open with the VKC plan.
Model answer pages open with the VKC plan.
Model answer pages open with the VKC plan.
Model answer pages open with the VKC plan.