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The inter convertibility of chromate ion...

The inter convertibility of chromate ion and dichromate ion in aqueous solution depends upon pH of the solution . Explain.

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Knowledge Check

  • Consider the following statements. I. Sodium dichromate is less soluble than potassium dichromate. II. Crystals of potassium dichromate are of orange colour. III. The chromates and dichromates are interconvertible in aqueous solution depending upon pH of the soultion. IV. The oxidation states of chromate and dichromate are different. The correct statements are

    A
    I, II, III and IV
    B
    II and IV
    C
    I and III
    D
    I and II

  • Consider the following statements. I. Sodium dichromate is more soluble than potassium dichromate. II. Crystals of potassium dichromate are of orange colour. III. The chromates and dichromates are interconvertible in aqueous solution depending upon pH of the solution.

    A
    Only II
    B
    II and III
    C
    I and III
    D
    All of these

  • Chromate and dichromate ions respectively are

    A
    `CrO_4^(2-)` and `Cr_2O_7^(2-)`
    B
    `Cr_2O_7^(2-)` and `CrO_4^(2-)`
    C
    `CrO_4^(2-)` and `Cr_2O_5^(2-)`
    D
    `Cr_2O_5^(2-)` and `CrO_4^(2-)`

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