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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

Q2(c). Bond orders of oxygen and carbon monoxide

Question

Calculate the bond order of the following molecules: O₂ and CO.

Answer in brief

BO(O₂) = 2 and BO(CO) = 3. Oxygen is paramagnetic; CO is diamagnetic.

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Topic notes: molecular orbital theory: LCAO, MO diagrams of N₂, O₂, CO, NO, CN⁻ and HF, bond order and magnetism, with every Civil Services, IFoS and Geo-Scientist PYQ →

Coversbond orderO₂ molecular orbitalcarbon monoxide MOparamagnetism of oxygenMO theory

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