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Indian Forest Service (Mains)

Chemistry optional

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

Paper I covers physical and inorganic chemistry.

Indian Forest Service (Mains), Chemistry optional · 2023 · Paper I

Q6(c). Catalysts and the Freundlich isotherm

Question

(i) Write five characteristic features of a catalyst. (ii) Discuss the important features, conditions and range of applicability of Freundlich adsorption isotherm.

Answer in brief

A catalyst changes reaction rate through an alternative pathway but not the equilibrium constant. Freundlich adsorption is an empirical, finite-range power law, q = KP1/n.

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Topic notes: adsorption isotherms, heterogeneous catalysis and colloids, with every Civil Services, IFoS and Geo-Scientist PYQ →

CoversFreundlich adsorption isothermcatalyst characteristicsadsorptionheterogeneous catalysislog x/m vs log P

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