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Aqueous colours of 3d metal ions

This type of question, asked 2 times: 2021 Paper 24, 23 Jan 2025. All 2 questions below, oldest first.

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  1. Question 1

    2021 Paper 24

    41
    In the given chemical reaction, colors of the Fe2+Fe^{2 +} and Fe3+Fe^{3 +} ions, are respectively:
    5Fe2++MnO4−+8H+→Mn2++4H2O+5Fe3+5Fe^{2 +}+MnO_{4}^{-}+ 8H^{+}\rightarrow Mn^{2 +}+ 4H_{2}O + 5Fe^{3 +}

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  2. Question 2

    23 Jan 2025

    41
    The correct set of ions (aqueous solution) with same colour from the following is :

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