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 26 
Pages 3 and 4 of 26 
Pages 5 and 6 of 26 
Pages 7 and 8 of 26 
Pages 9 and 10 of 26 
Pages 11 and 12 of 26
Pages 13 and 14 of 26 Pages 15 and 16 of 26 Pages 17 and 18 of 26 Pages 19 and 20 of 26 Pages 21 and 22 of 26 Pages 23 and 24 of 26 Pages 25 and 26 of 26 
Mains Paper I, inorganic chemistry
Solution, 2023
UPSC Combined Geo-Scientist, Stage II (Mains). 26 pages. Questions 1, 3, 4, 7, 8 and 10 are answered.
Every question of 2023, one page each38 parts in 11 questions, with the question as text and the key points of its answer
Question 1 50 marks
- 1(a)Crystal structures and a point defect5 marks
- 1(b)Labile and inert complexes5 marks
- 1(c)Effective atomic numbers5 marks
- 1(d)Colour change of phenolphthalein5 marks
- 1(e)Solubility of lead phosphate5 marks
- 1(f)Iodometry versus iodimetry5 marks
- 1(g)Displacement EDTA titration5 marks
- 1(h)Time for 74% radioactive material to remain5 marks
- 1(i)Back-donation and carbonyl stretching5 marks
- 1(j)Magnetism of vanadium ions5 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.
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.