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AP EAMCET202022 Sep 2020Morning ShiftChemistryp Block Elements (Group 15, 16, 17 & 18)Actual

Which among KI , FeSO ₄, ~K ₂ MnO ₄, KMnO ₄ can't be oxidised by O ₃ ?

Options

  1. AKl
  2. BFeSO ₄
  3. CK ₂ MnO ₄
  4. DKMnO ₄

Correct answer

D. KMnO ₄

Step-by-step solution

KMnO ₄ is not oxidised by O ₃ because KMnO ₄ produces MnO ₄⁻ ion, the Mn in this MnO ₄⁻ ion is in +VII oxidation state which is maximum for Mn. So, it cannot be further oxidised. Hence, the correct option is (4).

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