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H(3)BO(3) is :...

`H_(3)BO_(3)` is :

A

monobasic and weak lewis acid

B

monobasic and weak Bronsted acid

C

monobasic and strong Lewis acid

D

tribasic and weak Bronsted acid

Text Solution

Verified by Experts

The correct Answer is:
A
`B(OH)_(3)+2H_(2)O hArr [B(OH)_(4)]^(-)+H_(3)O^(+)`
Here, Boron completes its octet by accepting the `OH^(-)` from water molecule.So boric acid `H_(3)BO_(3)` is monobasic and weak Lewis acid and not proton donor (as it does not give proton). Back-bonding in `H_(3)BO_(3)` makes it weak.
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