UPSC Combined Geo-Scientist, Mains · 2023 · Mains Paper II
Q15(a). Fundamental of DCl from that of HCl (same force constant)
Question
Assuming that the force constant (k) of HCl and DCl are same being equal to 483 N m⁻¹, calculate the fundamental vibrational frequency (ν̄) of DCl, if that of HCl is 2890 cm⁻¹. (H = 1, D = 2, Cl = 35.5)
Model answer
The free solution for 2023 answers questions 1, 2, 3, 4, 6, 8, 10, 11, 13 and 14, the ones picked in its time plan. Question 15 is answered in full in the Geo-Scientist Chemistry Paper II, 2021 to 2025 book, with every part of every paper.
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UPSC Combined Geo-Scientist (Main) Chemistry Paper II: Model Answers 2021 to 2025
- All fifteen questions of each paper, with the question printed above its answer
- Numericals worked from formula to result with units; graphs with labelled axes
- Topic-wise weightage and a topic-wise index
Coversisotope effectvibrational frequencyHCl and DClreduced massforce constant
All parts of Question 15
- 15(a) Fundamental of DCl from that of HCl (same force constant)10 marks
- 15(b) Rule of mutual exclusion: CO₂ and H₂O10 marks