Indian Forest Service (Mains)
Chemistry optional
- 2 papers
- 200 marks each
- 3 h per paper
Paper II covers organic chemistry and spectroscopy.
All years
Pages 1 and 2 of 34 
Pages 3 and 4 of 34 
Pages 5 and 6 of 34 
Pages 7 and 8 of 34 
Pages 9 and 10 of 34
Pages 11 and 12 of 34 Pages 13 and 14 of 34 Pages 15 and 16 of 34 Pages 17 and 18 of 34 Pages 19 and 20 of 34 Pages 21 and 22 of 34 Pages 23 and 24 of 34 Pages 25 and 26 of 34 Pages 27 and 28 of 34 Pages 29 and 30 of 34 Pages 31 and 32 of 34 Pages 33 and 34 of 34
Paper II, organic chemistry and spectroscopy
Solution, 2024
Indian Forest Service (Mains), Chemistry optional. 34 pages. Questions 1, 2, 4, 5 and 8 are answered.
Every question of 2024, one page each47 parts in 8 questions, with the question as text and the key points of its answer
Question 1 40 marks
- 1(a)Annulenes and aromaticity5 marks
- 1(b)Secondary kinetic isotope effect5 marks
- 1(c)Five aromaticity decisions5 marks
- 1(d)Amination through a benzyne5 marks
- 1(e)Intramolecular aldol condensation5 marks
- 1(f)Pulegone to a ring-contracted ester5 marks
- 1(g)Photochemical alkyl migration5 marks
- 1(h)Hydrazine reductions5 marks
Question 2 40 marks
- 2(a)(i)A para-Claisen crossover experiment5 marks
- 2(a)(ii)Kinetic and thermodynamic enolates5 marks
- 2(b)(i)Photolysis of an ortho-methyl diazo compound5 marks
- 2(b)(ii)Bridgehead carbocation stability5 marks
- 2(b)(iii)Rearrangement during solvolytic elimination5 marks
- 2(c)(i)Hofmann elimination10 marks
- 2(c)(ii)Chugaev elimination5 marks
Question 3 40 marks
Question 4 40 marks
Question 5 40 marks
- 5(a)Weight-average molecular mass5 marks
- 5(b)Zero-point vibrational energy5 marks
- 5(c)Two Birch reductions5 marks
- 5(d)Geometry of a peptide bond5 marks
- 5(e)Norrish-II cleavage of a branched aldehyde5 marks
- 5(f)IR comparison of two secondary amides5 marks
- 5(g)Chlorine and bromine isotope patterns5 marks
- 5(h)Spin labels for macromolecules5 marks
Question 6 40 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.
Model answer pages open with the VKC plan.
Model answer pages open with the VKC plan.
Model answer pages open with the VKC plan.