1.

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

Answer»

Boron hydride
Pyroboric acid
Metaboric acid
Orthoboric acid

Solution :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 to4H_(3)BO_(3) + 2NaCl`
`Na_(2)B_(4)O_(7)+ H_(2)SO_(4) + 5H_(2)O to4H_(3)BO_(3) + Na_(2)SO_(4)`


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