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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

Q6(c). Cis and trans dichlorotetraamminecobalt(III)

Question

What is stereoisomerism? Explain isomerism in [Co(NH₃)₄Cl₂]⁺ emphasizing the structure and colour of the complex.

Answer in brief

Stereoisomers have the same connectivity but different spatial arrangements; octahedral [Co(NH₃)₄Cl₂]⁺ has cis (violet/purple) and trans (green) geometrical isomers.

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Coversstereoisomerismgeometrical isomerismcis-trans isomers[Co(NH₃)₄Cl₂]⁺praseo and violeo

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