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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 · 2023 · Mains Paper I

Q7(c). Products of permanganate reduction

Question

Mention the predominant converted form of MnO₄⁻ ion when KMnO₄ is used in the following cases: (i) in acidic medium (ii) in strongly alkaline medium (iii) in moderately alkaline medium

Answer in brief

(i) Mn²⁺; (ii) MnO₄²⁻; (iii) MnO₂(s).

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Topic notes: redox titrations, redox indicators and iodometry, with every Civil Services, IFoS and Geo-Scientist PYQ →

CoversKMnO4 in acidic mediummanganate MnO4 2-MnO2permanganate reduction productsequivalent weight of KMnO4

All parts of Question 7