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, 2019
UPSC Combined Geo-Scientist, Stage II (Mains). 7 pages, as issued by UPSC.
Every question of 2019, one page each51 parts in 10 questions, with the question as text and the key points of its answer
Question 1 40 marks
Question 2 30 marks
Question 3 30 marks
Question 4 30 marks
Question 5 30 marks
Question 6 40 marks
- 6(a)Ozonolysis of an exocyclic alkene4 marks
- 6(b)Stability of primary carbocations4 marks
- 6(c)Dehydration of pentan-2-ol4 marks
- 6(d)Peroxide effect4 marks
- 6(e)Fused cyclobutene opening4 marks
- 6(f)Benzyne substitution of p-iodotoluene4 marks
- 6(g)Inductive ether fragmentation4 marks
- 6(h)Schmidt reaction of cinnamic acid4 marks
- 6(i)Heterocycle aromaticity4 marks
- 6(j)Cyanohydrin acyl-anion equivalent4 marks
Question 7 30 marks
Question 8 30 marks
Question 9 30 marks