UPSC Combined Geo-Scientist, Mains · 2019 · Mains Paper I
Q10(b). Selection rules; weak broad d–d bands
Question
State the selection rules for electronic spectral transitions. Why do d–d transitions usually lead to weak and broad bands in the electronic spectra of transition metal complexes?
Model answer
The free solution for 2019 answers questions 1, 2, 4, 6, 9 and 11, the ones picked in its time plan. This part is not answered on the site yet. New answers are announced on Telegram.
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Coversselection rulesLaporte ruled-d transitionsspin selection rule
All parts of Question 10
- 10(a) Preparation of sodium borohydride5 marks
- 10(b) Selection rules; weak broad d–d bands10 marks
- 10(c) Silicate units and pyro-, cyclic and chain silicates15 marks