The products formed when borax dissolves in water is/are

Options

A. `NaOH, H_(3)BO_(3)`
B. `Na_(2)[B_(4)O_(5) (OH)_(4)]`
C. `NaH, B_(2)O_(3)`
D. `B_(2)H_(6), NaOH`

Answer

A

Explanation

When borax `(Na_(2)B_(4)O_(7))` is dissolved in water, it hydrolyses to form sodium hydroxide (NaOH) and boric acid `(H_(3)BO_(3))` which can be written as `B(OH)_(3) " or "H_(3)BO_(3)`.
`underset(("Borax"))(Na_(2)B_(4)O_(7))+7H_(2)O rarr underset(("sodium hydroxide"))(2NaOH)+underset(("Boric acid"))(4H_(3)BO_(3))`