Chemistry - Complete Pblock- Question with Solution | TestHub

Orthoboric acid ($H_{3}B{O}_3$) is a monobasic Lewis acid, not a tribasic acid. It accepts a hydroxide ion from water, releasing a proton, rather than donating three protons.

The other statements are correct:

1. It has a layer structure.

2. $B{O}_3$ units are bonded via H-bonds.

4. Prolonged heating yields $B_2{O}_3$.