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p-Block Elements - I
normal
$STATEMENT$-$1$: In water, orthoboric acid behaves as a weak monobasic acid. because
$STATEMENT$-$2$: In water, orthoboric acid acts as a proton donor.
A
Statement-$1$ is True, Statement-$2$ is True; Statement-$2$ is a correct explanation for Statement-$1$.
B
Statement-$1$ is True, Statement-$2$ is True; Statement-$2$ is $NOT$ a correct explanation for Statement-$1$.
C
Statement-$1$ is True, Statement-$2$ is False.
D
Statement-$1$ is False, Statement-$2$ is True.
(IIT-2007)
Solution
$\mathrm{H}_3 \mathrm{BO}_3$ (orthoboric acid) is a weak lewis acid.
$\mathrm{H}_3 \mathrm{BO}_3+\mathrm{H}_2 \mathrm{O} \rightleftharpoons \mathrm{B}(\mathrm{OH})_4^{-}+\mathrm{H}^{\oplus}$
It does not donate proton rather it acceptors $\mathrm{OH}^{-}$form water.
Hence $(C)$ is correct
Standard 11
Chemistry
