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On heating orthoboric acid to red hot, t...

On heating orthoboric acid to red hot, the reidue is :

A

Boron

B

Meta boric acid

C

Boron oxide.

D

Borax.

Text Solution

Verified by Experts

The correct Answer is:
C
`underset("Orthoboric acid")(H_(3)BO_(3))overset(100^(@)C)rarr HBO_(2) overset(160^(@)C)rarr H_(2)B_(4)O_(7)overset("Red hot")rarr B_(2)O_(3)`
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