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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

Q6(a). Writing coordination formulas

Question

Using IUPAC nomenclature state the formulae of the following: (i) Tetrakis(trifluorophosphine) nickel(0) (ii) Diamidotetra ammine cobalt(III) bromide (iii) Ammonium trioxalatocobaltate(III) (iv) Hexammine chromium(III) hexafluorocobaltate(III).

Answer in brief

(i) Ni(PF₃)₄; (ii) [Co(NH₂)₂(NH₃)₄]Br; (iii) (NH₄)₃[Co(C₂O₄)₃]; (iv) [Cr(NH₃)₆][CoF₆].

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