Q8(b). Structure of N₂O from its IR and Raman bands
We have the following spectral data for N₂O molecule: 589 cm⁻¹ — infrared strong, PQR contour; Raman not observed. 1285 cm⁻¹ — infrared very strong, PR contour; Raman very strong, polarized. 2224 cm⁻¹ — infrared very strong, PR contour; Raman strong, depolarized. From this data logically comment on the structure of the linear N₂O molecule. [data table given in the paper]
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
CoversN₂O structurerule of mutual exclusionIR and Raman spectraband contourscentre of symmetry
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