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MHT CET202521 Apr 2025Evening ShiftChemistryRedox ReactionsActual

What is the number of electrons transferred considering Mn when KMnO ₄ is converted into Mn ₂ O ₃ ?

Options

  1. A1
  2. B3
  3. C4
  4. D5

Correct answer

C. 4

Step-by-step solution

Oxidation State of Manganese in KMnO 4 and Mn 2 O 3 For KMnO ₄ , potassium has an oxidation state of +1 and oxygen -2 . Let the oxidation state of manganese be x . The compound is neutral, so +1 + x + 4(-2) = 0 , simplifying to x - 7 = 0 and x = +7 . For Mn ₂ O ₃ , oxygen has an oxidation state of -2 . Let the oxidation state of manganese be y . Then, 2y + 3(-2) = 0 , so 2y - 6 = 0 , 2y = 6 , and y = +3 . Electron Transfer Calculations The oxidation state of manganese changes from +7 to +3 , a decrease of 4 . This

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