Q3. Limits of powder XRD: Co–Ni alloy and sub-micron crystallites
Explain the limitations of powder X-ray diffraction to analyze samples with the following conditions: (a) an alloy consisting of Co and Ni; (b) powders with average crystallite size in sub-micron scale.
Model answer
The free solution for 2025 answers questions 1, 2, 4, 5, 6, 7, 10, 11, 12 and 13, the ones picked in its time plan. Question 3 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
Coverspowder X-ray diffractionXRD limitationsScherrer equationpeak broadeningCo–Ni alloyneutron diffraction