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UPSC Combined Geo-Scientist

Chemist

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

Mains Paper I covers inorganic chemistry.

UPSC Combined Geo-Scientist, Mains · 2019 · Mains Paper I

Q4(b). Nickel chloride and cyanide complexes

Question

Predict the structure and magnetic behaviour of [NiX₄]²⁻ (X=Cl,CN) complexes on the basis of Valence Bond Theory.

Answer in brief

[NiCl₄]²⁻ is tetrahedral and paramagnetic; [Ni(CN)₄]²⁻ is square planar and diamagnetic.

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CoversNickel chloridecyanide complexesGeometry and magnetism

All parts of Question 4