Q5(b). Ligand field strength of four Cr(III) complexes
Arrange the following complexes based on their increasing ligand field strength with reason: [CrCl₆]³⁻, [Cr(dtp)₃], [Cr(NH₃)₆]³⁺ and [Cr(CN)₆]³⁻ (where dtp = diethyldithiophosphate).
Model answer
The free solution for 2025 answers questions 1, 3, 4, 6, 9 and 10, the ones picked in its time plan. Question 5 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 →
Coversspectrochemical seriesligand field strengthCr(III) complexescrystal field splittingdiethyldithiophosphate
All parts of Question 5
- 5(a) Structure and geometry of four species10 marks
- 5(b) Ligand field strength of four Cr(III) complexes10 marks
- 5(c) Blood volume by ²⁴Na isotope dilution10 marks