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 37 
Pages 3 and 4 of 37 
Pages 5 and 6 of 37 
Pages 7 and 8 of 37 
Pages 9 and 10 of 37 
Pages 11 and 12 of 37 
Pages 13 and 14 of 37 
Pages 15 and 16 of 37 
Pages 17 and 18 of 37 Pages 19 and 20 of 37 Pages 21 and 22 of 37 Pages 23 and 24 of 37 Pages 25 and 26 of 37 Pages 27 and 28 of 37 Pages 29 and 30 of 37 Pages 31 and 32 of 37 Pages 33 and 34 of 37 Pages 35 and 36 of 37 Page 37 of 37 
Mains Paper II, physical chemistry
Solution, 2022
UPSC Combined Geo-Scientist, Stage II (Mains). 37 pages. Questions 1, 2, 3, 4, 6, 7, 10, 12, 13 and 15 are answered.
Every question of 2022, one page each39 parts in 15 questions, with the question as text and the key points of its answer
Question 1 80 marks
- 1(a)Postulates of kinetic theory and the two that fail5 marks
- 1(b)Boyle temperature of oxygen as a van der Waals gas5 marks
- 1(c)Temperature coefficient of conductivity: metal and semiconductor5 marks
- 1(d)Why KCl diffracts like a simple cubic lattice5 marks
- 1(e)Reversal of HCl + NH₃ ⇌ NH₄Cl with temperature5 marks
- 1(f)ΔG for compressing a real gas, from fugacities5 marks
- 1(g)Half-life of a second-order reaction5 marks
- 1(h)Brownian movement and Tyndall effect: why only colloids5 marks
- 1(i)Nernst equation for the redox electrode Pt | Cr⁶⁺, Cr³⁺5 marks
- 1(j)Same electrode positive or negative5 marks
- 1(k)Energy uncertainty of an excited state5 marks
- 1(l)Eigenvalues of a Hermitian operator are real5 marks
- 1(m)Rotational constants of ¹⁴N¹⁶O and ¹⁵N¹⁶O5 marks
- 1(n)Photon–molecule interaction in rotating HCl5 marks
- 1(o)Why radiative transitions are drawn vertical5 marks
- 1(p)Energy of one einstein at 600 nm and 300 nm5 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
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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.
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.