A. Copper sulphate
B. Barium sulphate / Mg+2 / Al3+ salts
C. Cobalt sulphate
D. Nickel sulphate
- Borax Bead Test: It is a chemical test to disclose the presence of certain metals in a sample.
- A simple laboratory test for certain metal ions in salts. A small amount of the salt is mixed with borax and a molten bead formed on the end of a piece of platinum wire.
- Certain metals can be identified by the colour of the bead produced in the oxidizing and reducing parts of a Bunsen flame.
- Sodium tetaraborate decahydrate Na2B4O7.10H2O→Na2B4O7→2NaBO2+B2O3
B2O3 combines with metal oxides to form metal metaborates which form coloured beads. This reaction is called “Borax bead test” B2O3+CoO → Co(BO2)2
Submitted by :- Jamil Ahmed