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
Question paper, 2024
Indian Forest Service (Mains), Chemistry optional. 9 pages, as issued by UPSC.
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