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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 · 2021 · Paper I

Q5(c). Separation of lanthanoids

Question

What are the different methods used for separation of lanthanides?

Answer in brief

The principal methods are fractional crystallisation/precipitation, selective oxidation or reduction, ion-exchange chromatography and solvent extraction.

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The full model answer

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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Topic notes: lanthanides and actinides (lanthanide contraction, magnetic moments, separation), with every Civil Services, IFoS and Geo-Scientist PYQ →

Coversseparation of lanthanidesion-exchange chromatographysolvent extractionfractional crystallisationlanthanoids

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