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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:
2
`Na_(2)B_(4)O_(7).10H_(2)Ooverset(Delta)rarrNa_(2)B_(4)O_(7)+10H_(2)O_(2)," "Na_(2)B_(4)O_(7)overset(Delta)rarr2NaBO_(2)+B_(2)O_(3)`
`CuO+B_(2)O_(3)overset(Delta)rarrCu(BO_(2))_(2)("copper"(II)"metaborate")-` blue bead in oxidising flame.
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