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A glassy bead formed by heating borax on...

A glassy bead formed by heating borax on a platinum wire loop is

A

`Na_2 B_4 O_7 10H_2 O`

B

`H_3 BO_3`

C

`B_2 H_6`

D

`Ca_2 B_6 O_(11)`

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The correct Answer is:
A
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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. Glassy bead of :

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. Glassy bead of :

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:

State with equations what happens when borax is heated on a platinum wire loop and to resulting transparent mass, a mixture amount of CuO is added and the mixture is again heated. (a) First in the oxidising flame and (b) Then in the reducing flame of a Bunsen burner ?

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. Blue bead can be of:

What is borax bead mixture ?

i.(A) overset(Delta)to glassy traparent beat (B) on platinum wire (B) + CuSO_(4) rarr coloured bead(C ) ii underset((D))((A))+conc. H_(2)SO_(4)+CH_(3)CH_(2)OH overset("ignite")rarr green flame iv.Aqueous solution (A) is alkline Identify (B) .

i.(A) overset(Delta)to glassy traparent beat (B) on platinum wire (B) + CuSO_(4) rarr coloured bead(C ) ii underset((D))((A))+conc. H_(2)SO_(4)+CH_(3)CH_(2)OH overset("ignite")rarr green flame iv.Aqueous solution (A) is alkline Identify AC.

i.(A) overset(Delta)to glassy traparent beat (B) on platinum wire (B) + CuSO_(4) rarr coloured bead(C ) ii underset((D))((A))+conc. H_(2)SO_(4)+CH_(3)CH_(2)OH overset("ignite")rarr green flame iv.Aqueous solution (A) is alkline Identify A .

i.(A) overset(Delta)to glassy traparent beat (B) on platinum wire (B) + CuSO_(4) rarr coloured bead(C ) ii underset((D))((A))+conc. H_(2)SO_(4)+CH_(3)CH_(2)OH overset("ignite")rarr green flame iv.Aqueous solution (A) is alkline Identify D.