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, 2016
UPSC Combined Geo-Scientist, Stage II (Mains). 12 pages, as issued by UPSC.
Every question of 2016, one page each50 parts in 12 questions, with the question as text and the key points of its answer
Question 1 40 marks
- 1(a)Temperature and neutrality4 marks
- 1(b)Glass-electrode errors4 marks
- 1(c)Solid-phase extraction4 marks
- 1(d)Density of silver4 marks
- 1(e)Auxiliary complexing agent4 marks
- 1(f)Butyric-acid extraction4 marks
- 1(g)DMG reagent requirement4 marks
- 1(h)HPLC and GLC4 marks
- 1(i)AAS background correction4 marks
- 1(j)Solubility product from potentials4 marks
Question 2 15 marks
Question 3 15 marks
Question 4 15 marks
Question 5 15 marks
Question 6 15 marks
Question 7 40 marks
- 7(a)Acidity and hybridisation4 marks
- 7(b)Dichlorocarbene addition4 marks
- 7(c)Grignard addition to a keto ester4 marks
- 7(d)Dipole moment of cyclopropenone4 marks
- 7(e)Cannizzaro reaction4 marks
- 7(f)Frontier orbital nodes4 marks
- 7(g)Keto–enol claim: correction4 marks
- 7(h)Hofmann rearrangement and oxidation4 marks
- 7(i)Carbonyl stretching order4 marks
- 7(j)Carbon count from isotope peaks4 marks
Question 8 15 marks
Question 9 15 marks
Question 10 15 marks
Question 11 15 marks