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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 · 2016 · Mains Paper II

Q2(ii). Effusion of a mixture

Question

For the same capsule at 1.0 atm and 290 K, find the pressure-drop rate for a mixture of 30.0 mol% He, 20 mol% O₂ and 50 mol% N₂.

Answer in brief

The initial total pressure-drop rate is 0.377 torr s⁻¹.

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As written for the answer booklet: the diagram carries the working, the lines stay short. Read here only; it is not offered as a download.

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Read the whole 2016 solution2016 question paper

CoversEffusion of a mixtureKinetic theory

All parts of Question 2