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Borax bead test is used to identify the...

Borax bead test is used to identify the

A

Anion in coloured salt

B

Cation in coloured salt

C

Anion in white salt

D

Cation in white salt

Text Solution

Verified by Experts

The correct Answer is:
B
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Borax Bead Test is carried out when the original mixture is coloured. It is done with the help of a cleam platinum wire on which a small loop is made at the end. When borax is heated on platinum wire loop transparent glass like bead is obtained. The hot bead is brought in contact with salt till it reacts with fused borax and colour is imparted to the bead. bead colour is noted. {:("Colour of the bead","Ion"),(1." Blue green",Cu^(2+)),(2." Yellow ",Fe^(3+)),(3." Green",Cr^(3+)),(4." Violet",Mn^(2+)),(5." Dark blue",Co^(2+)),(6." Brown",Ni^(2+)):} Q. The flame used in Borax Bead Test is:

Boron form many compound like boric acid, borax inorganc graphite etc. Orthoboric acid contain triangular BO_(3)^(2-) units. In the solid the B(OH)_(3) units are hydrogen bonded together into 2-D sheets with almost hexagonal summetry. Borax is used in borax bead best. Borax bead test can be used to detect