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JEE Main20236 Apr 2023Evening ShiftChemistryRedox ReactionsActual

During the reaction of permanganate with thiosulphate, the change in oxidation of manganese occurs by value of 3 . Identify which of the below medium will favour the reaction.

Options

  1. ABoth aqueous acidic and neutral
  2. BAqueous neutral
  3. CBoth aqueous acidic and faintly alkaline
  4. DAqueous acidic

Correct answer

B. Aqueous neutral

Step-by-step solution

In neutral or weakly alkaline solution oxidation state of Mn changes by 3 unit. The reaction between permanganate and thiosulfate is a redox reaction, in which permanganate acts as an oxidizing agent and thiosulfate acts as a reducing agent. MnO 4 ⊝ + S 2 O 3 - 2 → MnO 2 + SO 4 - 2 This ionic mechanism is favoured in neutral aqueous medium.

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