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Zinc is added to a solution of potassium...

Zinc is added to a solution of potassium dicyanoaurate (I)

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Knowledge Check

  • The deep brown colour produced when iodine is dissolved in a solution of potassium iodide is caused by the presence of:

    A
    `I_2`
    B
    `I^-`
    C
    `I_3^-`
    D
    `I_2^-`

  • When H_2O_2 is added to ice cold solution of acidified potassium dichromate in ether and the contents are shaken and allowed to stand

    A
    a blue colour is obtained in ether due to formation of `Cr_2(SO_4)_3`
    B
    a blue colour is obtained in ether due to formation of `CrO_5`
    C
    a blue colour is obtained in ether due to formation of `CrO_3`
    D
    chromyl chloride is formed