Given below are two statements : one is labelled as Assertion A and the other is labelled as Reason R.
Assertion : Boric acid is a weak acid.
Reason R : Boric acid is not able to release $\mathrm{H}^{+}$ ion on its own. It receives $\mathrm{OH}^{-}$ ion from water and releases $\mathrm{H}^{+}$ ion.
In the light of the above statements, choose the most appropriate answer from the options given below.
Solution
Boric acid is a weak acid
<br/><br/>
$$
\mathrm{H}_{3} \mathrm{BO}_{3}+\mathrm{H}_{2} \mathrm{O} \rightleftharpoons\left[\mathrm{B}(\mathrm{OH})_{4}\right]^{\ominus}+\mathrm{H}^{\oplus}
$$
<br/><br/>
Boric acid is not able to release $\mathrm{H}^{+}$ ion on its own. It receives $\mathrm{OH}^{-}$ ion from water and releases $\mathrm{H}^{+}$ ion as shown in the above reaction.
<br/><br/>
Hence, Both A and R are correct and R is the correct explanation of A.
About this question
Subject: Chemistry · Chapter: p-Block Elements · Topic: Group 13: Boron Family
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