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KVPY2012ChemistryRedox Reactions

The number of moles of Br ₂ produced when two moles of potassium permanganate are treated with excess potassium bromide in aqueous acid medium is -

Options

  1. A5
  2. B3
  3. C2
  4. D4

Correct answer

A. 5

Step-by-step solution

KMnO ₄+ KBr + H ₂ SO ₄ MnSO ₄+ K ₂ SO ₄+ Br ₂+ H ₂ O Balanced equations 2 KMnO ₄+10 KBr +8 H ₂ SO ₄ 2 MnSO ₄+5 Br ₂+6 ~K ₂ SO ₄+8 H ₂ O Eq.of KMnO ₄= Eq . of Br ₂ Mole n = Mole n 2 5= Mole 2

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