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Change in Mn oxidation state or electrons gained by permanganate in a given medium

This type of question, asked 5 times: 29 Jul 2022, 6 Apr 2023, 10 Apr 2023, 15 Apr 2023, 4 Apr 2025. All 5 questions below, oldest first.

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  1. Question 1

    29 Jul 2022

    40
    In neutral or faintly alkaline medium, KMnO4KMnO_{4} being a powerful oxidant can oxidize, thiosulphate almost quantitatively, to sulphate. In this reaction overall change in oxidation state of manganese will be:

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  2. Question 2

    6 Apr 2023

    130
    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.

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  3. Question 3

    10 Apr 2023

    142
    In alkaline medium, the reduction of permanganate anion involves a gain of ____electrons.

  4. Question 4

    15 Apr 2023

    53
    The total change in the oxidation state of manganese involved in the reaction of KMnO4KMnO_{4} and potassium iodide in the acidic medium is____

  5. Question 5

    4 Apr 2025

    47
    KMnO4{KMnO}_{4} acts as an oxidising agent in acidic medium. ' X ' is the difference between the oxidation states of Mn in reactant and product. ' Y ' is the number of ' dd ' electrons present in the brown red precipitate formed at the end of the acetate ion test with neutral ferric chloride. The value of X+YX + Y is ____.