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Oxidation state of the metal in a given species

This type of question, asked 3 times: 9 May 2024 S2, 16 Apr 2026 S2, 19 Apr 2026 S2. All 3 questions below, oldest first.

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  1. Question 1

    9 May 2024 S2

    83
    What is the stock notation of Manganese dioxide?

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  2. Question 2

    16 Apr 2026 S2

    31
    What is the oxidation state of chromium in the final product when KI reacts with acidified potassium dichromate solution?

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  3. Question 3

    19 Apr 2026 S2

    38
    Identify species having metal atom in +6+6 oxidation state from following

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