Question

Borax on heating with cobalt oxide forms a blue bead of :

• A. Co(BO2)2
• B. CoBO2
• C. Co3(BO3)2
• D. Na3Co(BO3)2

Answer 1

Answer: (A)

Co(BO2)2

Answer 2

CoO + B2O3 $\longrightarrow$ Co(BO2)2 (blue bead)