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UPSC Combined Geo-Scientist

Chemist

  • 3 descriptive papers
  • 200 marks each
  • 3 h per paper

Mains Paper II covers physical chemistry.

UPSC Combined Geo-Scientist, Mains · 2017 · Mains Paper II

Q10(a). First-order Bragg angle for Ag (111)

  • 5 marks
  • Topic: Solids
  • Question only
Question

Silver crystallizes in an f.c.c. structure with a unit cell length of 408.6 pm. Using the Bragg equation, calculate the first-order diffraction angle for the (111) plane using X-rays of wavelength 154.433 pm.

Model answer

The free solution for 2017 answers questions 1, 2, 3, 4, 5, 8, 9, 12, 13 and 15, 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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CoversBragg equationfcc silver(111) planeX-ray diffraction

All parts of Question 10