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COMEDK2018ChemistrySurface Chemistry

An example for auto-catalysis is

Options

  1. Aoxidation of NO to NO ₂
  2. Boxidation of SO ₂ to SO ₃
  3. Cdecomposition of KClO ₃ to KCl and O ₂
  4. Doxidation of oxalic acid by acidified KMnO ₄

Correct answer

D. oxidation of oxalic acid by acidified KMnO ₄

Step-by-step solution

An example of auto-catalysis is oxidation of oxalic acid by acidified KMnO ₄ solution. In this reaction, one of the product ( Mn ²⁺ ) formed act as a catalyst and speed up the reaction. 2 MnO ₄⁻+6 H ⁺+5 C ₂ H ₂ O ₄ Permagnate ion Oxalic acid 2 Mn ²⁺+8 H ₂ O +10 CO ₂ where Mn ²⁺+8 is the Auto-catalyst

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