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
Pages 1 and 2 of 19 
Pages 3 and 4 of 19
Pages 5 and 6 of 19 Pages 7 and 8 of 19 Pages 9 and 10 of 19 Pages 11 and 12 of 19 Pages 13 and 14 of 19 Pages 15 and 16 of 19 Pages 17 and 18 of 19 Page 19 of 19 
Mains Paper III, analytical and organic chemistry
Solution, 2019
UPSC Combined Geo-Scientist, Stage II (Mains). 19 pages. Questions 1, 3, 4, 6, 7 and 10 are answered.
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
Part of VKC Basic
Read the full model answer to every question of this paper with VKC Basic
VKC Basic (₹999 for 6 months) opens every solved answer, the notes, the handbook and the daily answer archive. Every Mains test series includes it.
Model answer pages open with the VKC plan.
Model answer pages open with the VKC plan.
Model answer pages open with the VKC plan.
Model answer pages open with the VKC plan.
Model answer pages open with the VKC plan.
Model answer pages open with the VKC plan.
Model answer pages open with the VKC plan.
Model answer pages open with the VKC plan.
Printed copy and Kindle
UPSC Combined Geo-Scientist (Main) Chemistry Paper III: Model Answers 2021 to 2025
The book has all five years of Paper III in one volume, with all ten questions of every paper answered, the question printed above each answer, a time plan for each paper, the topic-wise weightage of marks and a topic-wise index.