Equilibrium - Result Question 51
####53. Which one of the following compounds is not a protonic acid?
(a) $SO_2(OH)_2$
(b) $B(OH)_3$
(c) $PO(OH)_3$
(d) $SO(OH)_2$
[2003]
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Solution:
- (b) $B(OH)_3$ does not provide $H^{+}$ions in water instead it accepts $OH^{-}$ion and hence it is Lewis acid
$ B(OH)_3+H_2 O \rightarrow[B(OH)_4]^{-}+H^{+} $
