Borax on heating with cobalt oxide forms a blue bead of

A white precipitate (X) is formed when a mineral (A) is boiled with Na_(2)CO_(3) solution. The precipitate is filtered and filtrate contains two compound (Y) and (Z). The compound (Y) is removed by crystallization and when CO_(2) is passed through the filtrate obtained after crystallization, then (Z) changed to (Y) . When compound (Y) is heated, it gives two compounds (Z) and (T). Compound (T) on heating with cobalt oxide produces blue coloured substance (S) When cobalt oxide is heated with (Y), then a bead (S) is formed which is blue in colour. The bead (S) is

When Borax is heated it forms a colourless glassy bead because of formation of :

When Borax is heated it forms a colourless glassy bead because of formation of :

Borax when heated on platinum wire forms a glass like bead which is made up of :

Borax when heated on platinum wire forms a glass like bead which is made up of :

Borax when heated on platinum wire forms a glass like bead which is made up of

In Borax bead test, metal oxides react with B_(2)O_(3) and form a coloured bead. This bead contains