What happens when a mixture of cobalt oxide and borax is heated in a flame on a loop of platinum wire ?

2 3 2 2 B O CoO Co BO cobalt metaborate bluebead + ® 43. (S) Which of the following compounds is formed in borax bead test? (a) Metaborate (b) tetraborate (c) Double oxide (d) Orthoborate It is used in the detection of metals. The reaction occurred in the borax bead test is as follows: 2 4 7 2 2 4 7 Na B O .10H O Na B O D ¾¾® 2 2 3 2NaBO B O D ¾¾® + Borax is heated to give sodium metaborate and boric anhydride.