UPSC Combined Geo-Scientist, Mains · 2024 · Mains Paper III

Q3(a). Qualitative phase analysis by X-ray powder diffraction

10 marks
Topic: X-ray methods of analysis
Question only

Question

What is X-ray diffraction qualitative phase analysis? How is it measured? Mention its major applications.

Model answer

The free solution for 2024 answers questions 1, 4, 5, 6, 7 and 9, the ones picked in its time plan. Question 3 is answered in full in the Geo-Scientist Chemistry Paper III, 2021 to 2025 book, with every part of every paper.

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UPSC Combined Geo-Scientist (Main) Chemistry Paper III: Model Answers 2021 to 2025

All ten questions of each paper, with the question printed above its answer
Instruments drawn as labelled diagrams, numericals worked with units
Topic-wise weightage and a topic-wise index

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Topic notes: X-ray methods and ICP (Bragg's law, powder XRD, XRF, ICP torch, ICP-MS interferences), with every Civil Services, IFoS and Geo-Scientist PYQ →

CoversX-ray diffractionpowder XRDphase identificationBragg's lawICDD PDF database

All parts of Question 3

3(a) Qualitative phase analysis by X-ray powder diffraction10 marks
3(b) Components of the ICP; the sampler–skimmer interface10 marks
3(c) Theoretical oxygen demand; air for burning producer gas10 marks