UPSC Combined Geo-Scientist, Mains · 2022 · Mains Paper II
Q11(a). Particle in a box and the absorption bands of polyenes
Question
From the concept of “particle in a box”, how would you predict the relative positions of the absorption bands of linear conjugated alkenes as the chain length increases?
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 11 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
Coversparticle in a boxconjugated polyenesfree electron modelHOMO–LUMO gapred shiftλmax
All parts of Question 11
- 11(a) Particle in a box and the absorption bands of polyenes10 marks
- 11(b) Number of unit cells in 100 g of a cubic metal10 marks