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NTA Abhyas JEE Main2020ChemistryRedox ReactionsPractice

Which of the following acts as an oxidising as well as reducing agent?

Options

  1. AN a 2 O
  2. BH 2 S O 4
  3. CH N O 3
  4. DH N O 2

Correct answer

D. H N O 2

Step-by-step solution

As in H N O 2 , N is in +3 oxidation state but nitrogen can have oxidation states from − 3 to + 5 so it is in between the maximum and minimum oxidation state hence it can either get reduced or oxidized, depending on the conditions. It means it can act both as an oxidizing and a reducing agent. It can work both as oxidising as well as reducing agent. (I) As an oxidising agent: H N O 2 + 2 H + + e - → N O + H 2 O (II) As reducing agent: H N O 2 + H 2 O → N O 3 - + 3 H + + 2 e -

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