Q1 / 159 · NTA Abhyas (NEET) 2020 · Chemistry · d and f Block Elements

In chemical reaction of potassium ferrocyanide and hydrogen peroxide in the presence of dil. H2SO4

  • A
    Ferrocyanide gets reduced to ferricyanide
  • Correct answer
    B
    Ferrocyanide gets oxidised
  • C
    Iron does not change its oxidation state
  • D
    Hydrogen peroxide is oxidised

Solution

In reaction of potassium ferrocyanide and hydrogen peroxide in the presence of dil. H2SO4
[Fe(CN)6]4- is oxidised by H2O2 into [Fe(CN)6]3- ions.
2 K 4 [Fe (CN) 6 ]+ H 2 O 2 →2 K 3 [Fe (CN) 6 ]+2KOH

Hence, the correct answer is option: 'B'.

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