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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

Q7(a). Most probable speed from the Maxwell distribution

Question

Define 'most probable speed' of a molecule in a gaseous system. Derive its expression using the Maxwell speed distribution f(c) dc = 4π(m/2πkT)3/2 c² e−mc²/2kT dc.

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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Coversmost probable speedMaxwell distributionkinetic theory√(2kT/m)

All parts of Question 7