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NTA Abhyas JEE Main2020Chemistryp Block Elements (Group 15, 16, 17 & 18)Practice

Among oxyacids of nitrogen H N O 2 is unstable, it can acts as

Options

  1. AOxidising agent
  2. BReducing agent
  3. COxidising agent and Reducing agent
  4. DIts solution is stable

Correct answer

C. Oxidising agent and Reducing agent

Step-by-step solution

Nitrous acid behaves as reducing as well as an oxidising agent. It reduces potassium permanganate, potassium dichromate, H 2 O 2 and other strong oxidising agents. It oxidises strong reducing agents such as hydroiodic acid, sulphurous acid etc. It oxidises F e + 2 into F e + 3 in acidic medium; F e + 2 + H N O 2 + H + → F e + 3 + N O + H 2 O It reduces acidified K M n O 4 . 2 K M n O 4 + 3 H 2 S O 4 + 5 H N O 2 → K 2 S O 4 + 2 M n S O 4 + 3 H 2 O + 5 H N O 3

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