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Write the chemical reactions associated ...

Write the chemical reactions associated with the 'borax' best 'test' of cobalt `(II)` oxide.

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The correct Answer is:
A, B, C, D
`Na_(2)B_(4)O_(7).10H_(2)O underset(-10H_(2)O)overset(Delta)toB_(2)O_(3)+2Na^(+)+BO_(2)^(-), B_(2)O_(3)+CoO to underset("Blue bead")(Co(BO_(2))_(2)`
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