Borax bead test is based upon the formation ofA. MetaborateB. Tetrabor – InterviewSolution

1.	Borax bead test is based upon the formation ofA. MetaborateB. TetraborateC. Double oxideD. Orthoborate
Answer» Correct Answer - A Borax on heating gives `B_(2)O_(3)` (transparent glassy bead). When hot `B_(2)O_(3)` is brought in contact with coloured salt, metaborates are formed. `Na_(2)B_(4)O_(7).10H_(2)O overset(Delta)rarr B_(2)O_(3) overset("Coloured") underset("substance")rarr Metaborate`.

Discussion

No Comment Found

Related InterviewSolutions

`(Me)_(2) SiCl_(2)` on hydrolysis will produce.A. `(Me)_(2)Si(OH)_(2)`B. `(Me)_(2)Si = O`C. .D. `Me_(2)SiCl(OH)`
Boric acid is used in carrom boards for smooth gliding of pawns becauseA. `H_(3)BO_(3)` molecules ar loosely chemically bonded and hence soft.B. Its low density makes its fluffy.C. It si chemically inert with plywood.D. H-bonding in `H_(3)BO_(3)` give it a layered structure.
Boric acid is polymeric due to :
Boric acid is weak monobasic acid and acts as Lewis acid
Alumina is.
Alumina is not used as :A. Refractory materialB. A medium in chromatographyC. AbrasiveD. White pigment
On strong heating boric acid yieldsA. BB. `B_(2)`C. `B_(2)O_(3)`D. `B_(2)H_(6)`
What is not true about borax ?A. Molecular formula is `Na_(2)B_(4)O_(7). 10H_(2)O`.B. Crystallic borax contains tetranuclear unit of `[B_(4)O_(5)(OH)_(4)]^(2-)`.C. It hydrolyses to give an acidic solution.D. White crystalline solid.
The electrolysis of pure alumina is not feasible because of its _____ nature.
Borazole is aromatic is nature. Nitrigen contributes `pi` - electrons to the system.