Q7(b). Jahn–Teller effect and the spectra of octahedral Ni(III)
What is the Jahn-Teller effect? How does it affect the unsymmetrical electronic spectra of octahedral complexes of Ni(+III)?
Model answer
The free solution for 2025 answers questions 1, 3, 4, 6, 9 and 10, the ones picked in its time plan. Question 7 is answered in full in the Geo-Scientist Chemistry Paper I, 2021 to 2025 book, with every part of every paper.
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UPSC Combined Geo-Scientist (Main) Chemistry Paper I: Model Answers 2021 to 2025
- All eleven questions of each paper, with the question printed above its answer
- Titration, gravimetric and nuclear numericals worked with units; structures drawn
- Topic-wise weightage and a topic-wise index
Topic notes: crystal field theory, with every Civil Services, IFoS and Geo-Scientist PYQ →
CoversJahn-Teller effectNi(III) low spin d7tetragonal distortionelectronic spectraband splitting
All parts of Question 7
- 7(a) Thermodynamic and kinetic stability of three cyanide complexes10 marks
- 7(b) Jahn–Teller effect and the spectra of octahedral Ni(III)10 marks
- 7(c) Oxidation of iron(II) by chlorine10 marks