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Hydrogen peroxide oxidises Fe CN 6 4 - to Fe CN 6 3 - in acidic medium, but reduces Fe CN 6 3 - to Fe CN 6 4 - in alkaline medium. The other products formed are, respectively

Options

  1. AH 2 O   and   H 2 O + OH -
  2. BH 2 O + O 2   and   H 2 O
  3. CH 2 O + O 2   and   H 2 O + OH -
  4. DH 2 O   and   H 2 O + O 2

Correct answer

D. H 2 O   and   H 2 O + O 2

Step-by-step solution

Hydrogen undergoes the following changes: 1) While acting as an oxidising agent in an acidic medium, H 2 O 2 + 2 H + + 2 e - → 2 H 2 O 2) While acting as a reducing agent in an alkaline medium, H 2 O 2 + 2 OH - → O 2 + 2 H 2 O + 2 e -

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