Question

Boric acid is :

• A. monobasic and weak lewis acid
• B. monobasic and weak bronsted acid
• C. monobasic and strong lewis acid
• D. tribasic and strong bronsted acid

Answer 1

The correct option is A monobasic and weak lewis acid

Boric acid is monobasic acid and weak Lewis acid.

Boric acid contains $3-OH$ groups yet it acts as monobasic acid rather than tribasic acid. Because boric acid does not act as proton donor but it accepts a lone pair of electrons from $O{H}^{-}$ ions and forms ${B(OH{)}_4}^{-}$. Boric acid behaves as Lewis acid because it accepts a lone pair of electrons from $O{H}^{-}$ ions from water.

Boric acid considered as weak acid because it does not dissociate to produce ions rather forms metaborate ion and in turn release ions.