Question

Explain borax bead test with suitable example

Answer 1

Answer:

The borax bead test is based on the creation of a glassy bead that can variously change colour when put under a Bunsen flame, potentially revealing a whole series of compounds, depending on their chemical (electronic) features.

First of all a loop, eyelet, is made in the end of a platinum wire. Then it's loaded with borax or phosphorus salt and heating in the flame you get a clear, colorless glassy sphear, the so called "bead". The bead will be our reagent to identify specific cationic components (borax bead test) or cationic and anionic components (phosphorus salt bead test).

Answer 2

loop of pt wire was heated in non luminous flame touches into borax kept in a watch glass and again heated .borax was swelled first and then fused to form a colourless bead of sodium metaborate and boric anhydride