UPSC Combined Geo-Scientist
Chemist
- 3 descriptive papers
- 200 marks each
- 3 h per paper
Mains Paper I covers inorganic chemistry.
All years
Pages 1 and 2 of 33 
Pages 3 and 4 of 33 
Pages 5 and 6 of 33 
Pages 7 and 8 of 33 
Pages 9 and 10 of 33 
Pages 11 and 12 of 33
Pages 13 and 14 of 33 Pages 15 and 16 of 33 Pages 17 and 18 of 33 Pages 19 and 20 of 33 Pages 21 and 22 of 33 Pages 23 and 24 of 33 Pages 25 and 26 of 33 Pages 27 and 28 of 33 Pages 29 and 30 of 33 Pages 31 and 32 of 33 Page 33 of 33 
Mains Paper I, inorganic chemistry
Solution, 2024
UPSC Combined Geo-Scientist, Stage II (Mains). 33 pages. Questions 1, 2, 5, 6, 9 and 11 are answered.
Every question of 2024, one page each47 parts in 11 questions, with the question as text and the key points of its answer
Question 1 50 marks
- 1(a)Minerals and their compositions5 marks
- 1(b)Magnetic moment of titanium(III)5 marks
- 1(c)Choosing indicators5 marks
- 1(d)Silica by volatilisation gravimetry5 marks
- 1(e)Spontaneity of Fe²⁺ oxidation5 marks
- 1(f)Oxidising power and charge transfer5 marks
- 1(g)pH dependence of cyanide masking5 marks
- 1(h)Terminal and bridging carbonyl bands5 marks
- 1(i)Identifying radioactive decay5 marks
- 1(j)Why ordinary lanthanoid carbonyls are unstable5 marks
Question 2 30 marks
Question 3 30 marks
Question 4 30 marks
Question 5 30 marks
Question 6 30 marks
Question 7 30 marks
Question 8 30 marks
Question 9 30 marks
Question 10 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.
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 I: Model Answers 2021 to 2025
The book has all five years of Paper I in one volume, with all eleven 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.