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 16 
Pages 3 and 4 of 16 
Pages 5 and 6 of 16
Pages 7 and 8 of 16 Pages 9 and 10 of 16 Pages 11 and 12 of 16 Pages 13 and 14 of 16 Pages 15 and 16 of 16 
Mains Paper I, inorganic chemistry
Solution, 2020
UPSC Combined Geo-Scientist, Stage II (Mains). 16 pages. Questions 1, 3, 4, 7, 8 and 10 are answered.
Every question of 2020, one page each37 parts in 11 questions, with the question as text and the key points of its answer
Question 1 50 marks
- 1(a)Normal and inverse spinels5 marks
- 1(b)Trans effect5 marks
- 1(c)Boric acid titration5 marks
- 1(d)Aluminium oxinate5 marks
- 1(e)Iodometry and iodimetry5 marks
- 1(f)Magnesium-assisted EDTA endpoint5 marks
- 1(g)Triiron dodecacarbonyl5 marks
- 1(h)Masking and demasking5 marks
- 1(i)Iodine beta decay5 marks
- 1(j)Transition elements and CuCl5 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.
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.