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, 2022
Indian Forest Service (Mains), Chemistry optional. 8 pages, as issued by UPSC.
Every question of 2022, one page each48 parts in 8 questions, with the question as text and the key points of its answer
Question 1 40 marks
- 1(a)Pyridine versus imidazole5 marks
- 1(b)Cyanide addition to a hindered enone5 marks
- 1(c)Tracing the nitrile carbon5 marks
- 1(d)Dichlorocarbene trapping5 marks
- 1(e)Substituent effects on aryl negative charge5 marks
- 1(f)Why DMSO accelerates many SN2 reactions5 marks
- 1(g)Rearrangement during silver-assisted solvolysis5 marks
- 1(h)Organolithium and Baeyer–Villiger sequence5 marks
Question 2 40 marks
Question 3 40 marks
Question 4 40 marks
Question 5 40 marks
- 5(a)Hydrophobic effect in biomolecules5 marks
- 5(b)Stopping radical styrene polymerization5 marks
- 5(c)Complementary DNA and RNA sequence5 marks
- 5(d)CO bond length from rotational spacing5 marks
- 5(e)Isotope shift of C–H stretching5 marks
- 5(f)Relative carbonyl stretching frequencies5 marks
- 5(g)Epoxide opening by dimethylamine5 marks
- 5(h)Labelled allylic bromination5 marks
Question 6 40 marks
Question 7 40 marks