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Prussian blue test for Fe3+ with potassium ferrocyanide

This type of question, asked 4 times: 2021 Paper 20, 2021 Paper 24, 27 Jul 2022, 1 Feb 2023. All 4 questions below, oldest first.

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  1. Question 1

    2021 Paper 20

    41
    Acidic ferric chloride solution on treatment with excess of potassium ferrocyanide gives a Prussian blue coloured colloidal species. It is:

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  2. Question 2

    2021 Paper 24

    47
    The potassium ferrocyanide solution gives a Prussian blue colour, when added to :

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  3. Question 3

    27 Jul 2022

    140
    Fe3+Fe^{3 +} cation gives a prussian blue precipitate on addition of potassium ferrocyanide solution due to the formation of:

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  4. Question 4

    1 Feb 2023

    31
    A solution of FeCl3FeCl_{3} when treated with K4[Fe(CN)6]K_{4}\left\lbrack Fe(CN)_{6} \right\rbrack gives a Prussian blue precipitate due to the formation of

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