UPSC Combined Geo-Scientist, Mains · 2022 · Mains Paper II

Q9(b). Factors that control the fluorescence quantum yield

5 marks
Topic: Photochemistry
Question only

Question

On which factors does fluorescence quantum yield of a fluorophore in a solution depend?

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 9 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

Printed copy Kindle edition Read sample pages

Topic notes: photochemistry (quantum yield, Jablonski diagram, H₂–halogen reactions), with every Civil Services, IFoS and Geo-Scientist PYQ →

Coversfluorescence quantum yieldquenchingStern–Volmer equationheavy-atom effectintersystem crossing

All parts of Question 9

9(a) Fluorescence quantum yield by the relative method5 marks
9(b) Factors that control the fluorescence quantum yield5 marks