UPSC Combined Geo-Scientist, Mains · 2020 · Mains Paper III

Q5(b). Spectrophotometry of one- and two-component samples

10 marks
Topic: Spectroscopic methods of analysis
Question only

Question

Describe the spectrophotometric analysis of (i) a sample containing one absorbing component and (ii) a sample containing two absorbing components.

Model answer

The free solution for 2020 answers questions 1, 2, 4, 6, 8 and 10, the ones picked in its time plan. This part is not answered on the site yet. New answers are announced on Telegram.

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CoversspectrophotometryBeer's lawtwo-component analysissimultaneous equations

All parts of Question 5

5(a) Al and Mg from ignition of their oxinates5 marks
5(b) Spectrophotometry of one- and two-component samples10 marks
5(c) Balancing MnO₄⁻ + VO²⁺ in acid5 marks
5(d) F-test and t-test: voltammetry versus FIA10 marks