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On addition of mineral acid to an aqueou...

On addition of mineral acid to an aqueous solution of Borax, the following compound is formed

A

Boron hydride

B

Pyroboric acid

C

Metaboric acid

D

Orthoboric acid

Text Solution

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The correct Answer is:
D
Orthoboric acid is formed when an aqueous solution of borax is treated with hydrochloric or sulphuric acid.
`Na_(2)B_(4)O_(2) + 2HCl + 5H_(2)O to 4H_(3)BO_(3) + 2NaCl`
`Na_(2)B_(4)O_(7)+ H_(2)SO_(4) + 5H_(2)O to 4H_(3)BO_(3) + Na_(2)SO_(4)`
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