UPSC Combined Geo-Scientist, Mains · 2023 · Mains Paper I
Q2(a). Trans-effect control of platinum substitution
Question
[PtCl₄]²⁻ + NH₃ → A; A + NH₃ → B. [Pt(NH₃)₄]²⁺ + Cl⁻ → C; C + Cl⁻ → D. Identify A, B, C and D. Justify your answer. [reaction sequences given in the paper]
Model answer
The free solution for 2023 answers questions 1, 3, 4, 7, 8 and 10, the ones picked in its time plan. Question 2 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
Coverstrans effectsquare planar substitutioncisplatin synthesiscis- and trans-[PtCl2(NH3)2]
All parts of Question 2
- 2(a) Trans-effect control of platinum substitution10 marks
- 2(b) Kurnakov test for cis and trans complexes10 marks
- 2(c) Jahn-Teller splitting in Ti(III) spectra10 marks