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, 2024
UPSC Combined Geo-Scientist, Stage II (Mains). 9 pages, as issued by UPSC.
Every question of 2024, 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)Volume and critical temperature of two van der Waals gases5 marks
- 1(b)Second virial coefficient A₂ and the Boyle temperature5 marks
- 1(c)Conductors, semiconductors and insulators: band picture5 marks
- 1(d)Cubic and tetragonal Bravais lattices5 marks
- 1(e)Chemical potential and its change with temperature5 marks
- 1(f)Relation between Kp, Kc and Kx5 marks
- 1(g)Rate constant in dm³ mol⁻¹ s⁻¹5 marks
- 1(h)BET equation and its terms5 marks
- 1(i)Zinc–copper cell from two half-reactions5 marks
- 1(j)Alkaline (sodium) error of the glass electrode5 marks
- 1(k)Commutator of position and d/dx5 marks
- 1(l)Meaning and dimensions of |Ψ(x)|²5 marks
- 1(m)Raman effect against fluorescence and phosphorescence5 marks
- 1(n)H₂: no IR or microwave spectrum, but Raman active5 marks
- 1(o)Fluorescence rate constant of tryptophan5 marks
- 1(p)Why 511 nm light dissociates Br₂ but not H₂5 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