In the Borax bead test of `Co^(2+)`, the blue colour of bead is due to the formation of :

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Answer :

In the Borax bead test of `Co^(2+)`, the blue colour of bead is due to the formation of : A. `B_(2)O_(3)` B. ... B_(2)` C. `Co(BO_(2))_(2)` D. `Co O`

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