1.

The correct formula of borax is

Answer»

`Na_(2)[B_(4)O_(4)(OH)_(3)].9H_(2)O`
`Na_(2)[B_(4)O_(5)(OH)_(4)].8H_(2)O`
`Na_(2)[B_(4)O_(6)(OH)_(5)].7H_(2)O`
`Na_(2)[B_(4)O_(7)(OH)_(6)].6H_(2)O`

SOLUTION :the correct structureof borax has `4OH` groups and 8 molecules of WATEROF crystallization. Thus, option (a) is correct.


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