NEET2004ChemistryRedox ReactionsActual
For decolourization of 1 mole of KMnO ₄ , the moles of H ₂ O ₂ required is
Options
- A1 / 2
- B3 / 2
- C5 / 2
- D7 / 2 .
Correct answer
C. 5 / 2
Step-by-step solution
Acidified KMnO ₄ is decolourised by H ₂ O ₂ in following way. aligned & 2 KMnO ₄+3 H ₂ SO ₄ K ₂ SO ₄+2 MnSO ₄+3 H ₂ O +5 O & 5 H ₂ O ₂+5 O 5 H ₂ O +5 O ₂ & 2 KMnO ₄+3 H ₂ SO ₄+5 H ₂ O ₂ K ₂ SO ₄+2 MnSO ₄ & +8 H ₂ O +5 O ₂ & aligned Thus, for 2 moles of KMnO ₄ required H ₂ O ₂=5 For 1 mole of KMnO ₄ required H ₂ O ₂=5 / 2 mole.