Q8(a). Bond lengths of H₂, N₂, O₂ from rotational Raman spectra
Homonuclear diatomic molecules like H₂, N₂, O₂ are insensitive to microwave spectroscopy. Hence their bond lengths cannot be determined from microwave spectroscopy. How are their bond lengths determined? — Logically explain your answer.
Model answer
The free solution for 2022 answers questions 1, 2, 3, 4, 6, 7, 10, 12, 13 and 15, the ones picked in its time plan. Question 8 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
Coversrotational Raman spectroscopyhomonuclear diatomic moleculesbond lengthmicrowave inactiveselection rulesrotational constant
All parts of Question 8
- 8(a) Bond lengths of H₂, N₂, O₂ from rotational Raman spectra5 marks
- 8(b) Structure of N₂O from its IR and Raman bands5 marks