UPSC Combined Geo-Scientist
Chemist
- 3 descriptive papers
- 200 marks each
- 3 h per paper
Mains Paper III covers analytical and organic chemistry.
All years
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Mains Paper III, analytical and organic chemistry
Question paper, 2017
UPSC Combined Geo-Scientist, Stage II (Mains). 8 pages, as issued by UPSC.
Every question of 2017, one page each44 parts in 10 questions, with the question as text and the key points of its answer
Question 1 40 marks
- 1(a)Copper oxide mixture5 marks
- 1(b)Selective sulfate precipitation5 marks
- 1(c)Solvent effect on aniline basicity5 marks
- 1(d)Fluoride-selective electrode5 marks
- 1(e)Organic solvents in AAS5 marks
- 1(f)Flame ionisation detector5 marks
- 1(g)Proximate analysis by TGA5 marks
- 1(h)ICP-MS dilution calculation5 marks
Question 2 30 marks
Question 3 30 marks
Question 4 30 marks
Question 5 30 marks
Question 6 40 marks
- 6(a)Nitrophenol acidity5 marks
- 6(b)Benzene and cyclooctatetraene orbitals5 marks
- 6(c)Aldehyde electrophilicity5 marks
- 6(d)Carbocation stability5 marks
- 6(e)Steric inhibition of resonance5 marks
- 6(f)Cyclopropenone dipole5 marks
- 6(g)SN1 and aromatic cations5 marks
- 6(h)Exhaustive methylation of piperidine5 marks
Question 7 30 marks
Question 8 30 marks
Question 9 30 marks