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p-Block elements
Hard
Question
Borax on heating with cobalt oxide forms a blue bead of :
Options
A.
Co(BO
2
)
2
B.
CoBO
2
C.
Co
3
(BO
3
)
2
D.
Na
3
Co(BO
3
)
2
Solution
CoO + B
2
O
3
→ Co(BO
2
)
2
(blue bead)
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