UPSC Combined Geo-Scientist
Chemist
- 3 descriptive papers
- 200 marks each
- 3 h per paper
Mains Paper II covers physical chemistry.
All years
Pages 1 and 2 of 17 
Pages 3 and 4 of 17 
Pages 5 and 6 of 17
Pages 7 and 8 of 17 Pages 9 and 10 of 17 Pages 11 and 12 of 17 Pages 13 and 14 of 17 Pages 15 and 16 of 17 Page 17 of 17 
Mains Paper II, physical chemistry
Solution, 2019
UPSC Combined Geo-Scientist, Stage II (Mains). 17 pages. Questions 1, 2, 3, 4, 6, 8, 9, 11, 12 and 13 are answered.
Every question of 2019, one page each42 parts in 15 questions, with the question as text and the key points of its answer
Question 1 80 marks
- 1(a)Atomicity from heat capacities5 marks
- 1(b)Units of attraction parameter5 marks
- 1(c)Surface energy of cube and sphere5 marks
- 1(d)Atoms in a BCC sample5 marks
- 1(e)Volume independence of ideal-gas heat capacity5 marks
- 1(f)Entropy on doubling volume5 marks
- 1(g)Single-ion activity coefficients5 marks
- 1(h)Ammonia buffer5 marks
- 1(i)Pure-component vapour pressures5 marks
- 1(j)Zero-order half-life5 marks
- 1(k)Physical and chemical adsorption5 marks
- 1(l)Iron redox-electrode potential5 marks
- 1(m)Energy of one einstein5 marks
- 1(n)Bohr quantisation from matter waves5 marks
- 1(o)Spectral wavelength shifts5 marks
- 1(p)Bromobutane with one NMR signal5 marks
Question 2 10 marks
Question 3 10 marks
Question 4 10 marks
Question 5 10 marks
Question 6 10 marks
Question 7 10 marks
Question 8 10 marks
Question 9 10 marks
Question 10 10 marks
Question 11 20 marks
Question 12 20 marks
Question 13 20 marks
Question 14 20 marks
Part of VKC Basic
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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 II: Model Answers 2021 to 2025
The book has all five years of Paper II in one volume, with all fifteen 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.