Transition metal ions can be detected with the help of Borax bead test. Formula and colour of the bead formed by Cobalt (II) compounds in this test will be

Transition metal ions can be detected with the help of Borax bead test. Formula and colour of the bead formed by Cobalt (II) compounds in this test will be

  1. A

    CoB4O7, Green

  2. B

    Co3BO32, Blue

  3. C

    CoBO23, Green

  4. D

    CoBO22, Blue

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    Solution:

    Na2B4O7.10H2ONa2B4O7fuseNaBO2+B2O3colour less glassy bead

    CoO+B2O3 CoBO22Blue .

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