Question

Boric acid:

• A. exists in polymeric form due to intermolecular hydrogen bonding
• B. behaves as a weak monobasic acid
• C. is a tribasic acid
• D. is a white crytalline solid with soapy touch

Answer 1

Answer: (A), (B), (D)

is a white crytalline solid with soapy touch

Boric acid exists in polymeric from due to intermolecular hydrogen bonding as shown figure.

It is a weak monobasic acid soluble in water and in aqueous soution the boron atom completes its octet by accepting $O{H}^{-}$ from water molecules.
$B(OH{)}_3+2H_{2}O\rightleftharpoons [B(OH{)}_4{]}^{-}+H_3{O}^{+}$

It iis a white crytalline solid with soapy touch.

Hence a, b, d are correct.