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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 · 2016 · Paper I

Q5(a)(ii). Chemiluminescence

Question

Explain the following briefly: (ii) Chemiluminescence

Answer in brief

Chemiluminescence is the emission of light by an electronically excited product formed in a chemical reaction: A + B → C*, C* → C + hν. The excitation energy comes from the reaction itself, not from absorbed light.

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Coverselectronically excited stateluminol

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