Indian Forest Service (Mains)
Chemistry optional
- 2 papers
- 200 marks each
- 3 h per paper
Paper II covers organic chemistry and spectroscopy.
All topics
Paper II, organic chemistry and spectroscopy
Addition reactions: every question, 2021 to 2025
9 parts worth 50 marks have been set on this unit in UPSC IFoS Chemistry Paper II from 2021 to 2025. Each one opens on its own page with the question, the answer in brief and the key points.
Syllabus
Electrophilic addition to C=C and C≡C; nucleophilic addition to C=O, C≡N, conjugated olefins and carbonyls.
Notes: Addition to C=C and C≡C: Markovnikov, stereochemistry, dienes (full notes) · short notes
2025
- Q1(e) Oxymercuration of norbornene5 marks Answered
- Q4(c)(ii) 1,2 versus 1,4 addition5 marks Answered
2024
- Q4(a) Grignard addition and competing reduction10 marks Answered
2023
- Q3(a) Hydrogen bromide addition to a conjugated diene5 marks Question only
- Q4(a) Two electrophilic additions with unusual outcomes5 marks Question only
2022
- Q1(b) Cyanide addition to a hindered enone5 marks Answered
2021
- Q2(d)(ii) Chalcone, cyanide addition and reduction5 marks Answered
- Q4(d)(i) Regioselective hydration of allylbenzene5 marks Question only
- Q7(a)(ii) Hydration followed by oxidation5 marks Question only