The correct statement (s) for orthoboric acid is/are

Options

A. It behaves as a weak acid in water due to self ionization
B. Acidity of its aqueous solution increases upon addition of ethylene glycol
C. It has a three dimensional structure due to hydrogen bonding
D. It is weak electrolyte in water

Answer

B, D

Explanation

`H_(3)BO_(3)` does not undergo self ionization.
On adding cis-diols, they form complexing species with orthoboric acid. Hence the acidity increases on adding ethylene glycol.
`H_(3)BO_(3) + H_(2)O to B(OH)_(4)^(-) + H^(+)`
`B(OH)_(4)^(-) + 2 {:(CH_(2)-OH),("|"),(CH_(2)-OH):} to (##ERRL_CHE_V02_C16_E03_155_S01.png" width="80%">
It arranges into planar sheets due to H-bonding. Hence, it has 2 - dimensional structure due to H-bonding. It acts as a weak acid in water, so it is a weak electrolyte in water.