UPSC Combined Geo-Scientist
Chemist
- 3 descriptive papers
- 200 marks each
- 3 h per paper
Mains Paper II covers physical chemistry.
All years
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Mains Paper II, physical chemistry
Question paper, 2019
UPSC Combined Geo-Scientist, Stage II (Mains). 8 pages, as issued by UPSC.
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