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Which of the following compound is forme...

Which of the following compound is formed in borax bead test ?

A

Orthoborate

B

Metaborate

C

Double oxide

D

Tetraborate

Text Solution

Verified by Experts

The correct Answer is:
B
`Na_(2)B_(4)O_(7).10H_(2)O overset(Delta)toNa_(2)B_(4)O_(7)+10H_(2)O, Na_(2)B_(4)O_(7) overset(Delta)to2NaBO_(2)+B_(2)O_(3)`
`CuO+B_(2)O_(3)overset(Delta)toCu(BO_(2))_(2)` (copper (II) metaborate)-blue bead in oxidising flame.
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