In which of the following reactions does $H_2O_2$ act as a reducing agent?

  • A
    $PbO_{2(s)} + H_2O_{2(aq)} \to PbO_{(s)} + H_2O_{(l)} + O_{2(g)}$
  • B
    $Na_2SO_{3(aq)} + H_2O_{2(aq)} \to Na_2SO_{4(aq)} + H_2O_{(l)}$
  • C
    $2KI_{(aq)} + H_2O_{2(aq)} \to 2KOH_{(aq)} + I_{2(s)}$
  • D
    $KNO_{2(aq)} + H_2O_{2(aq)} \to KNO_{3(aq)} + H_2O_{(l)}$

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