Question

Match Column I with Column II:

Answer 1

A) There are $1-OH$ group.so it can donate One $H^{+}$ so it is mono basic.

B) There are $3-OH$ group.so it can donate three $H^{+}$.so it is tri basic.

C) There are $2-OH$ group. so it can donate two $H^{+}$.So it is di basic.

Acid is any compound which can donate $H^{+}$

$-OH$ group is an acid act as dones of $H^{+}$ ion hence responsible for the acidic behaviour.

The $3-OH$ group in basic acid doesn't give $H^{+}$ .Since boron has vacant P orbital, when it reacts with water it forms a coordinate bond with it. Aften water donates its Ione pair to Boron.Hence a positive charge is created as oxygen.As oxygen is electronegative, positive charge is not stable on it. So a proton is removed and the product is $B(OH{)}_4$.Hence it is mono basic.An acid which do not have ionise in $H_{2}O$ to give a proton is called a Aprotic acid.Hence from the above statement, Basic acid is Aprotic.