Which of the following statements are true for `H_(3)BO_(3)` ?

Options

A. It is mainly monobasic acid and a Lewis acid
B. It does not act as a proton donor but acts as an acid by accepting hydroxyl ions
C. It has a layer structure in which `BO_(3)` units are joined by hydrogen bonds
D. It is obtained by trating borax with conc. `H_(2)SO_(4)`

Answer

A, B, C, D

Explanation

`B(OH)_(3)+H_(2)O rarr [B(OH)_(4)]^(-)+H^(+)`
`H_(3)BO_(3)` has layered structure with `BO_(3)` units are joined by hydrogen bonds
`Na_(2)B_(4)O_(7)+H_(2)SO_(4)+5H_(2)O rarr Na_(2)SO_(4)+4H_(3)BO_(3)`