Basicity of H_3BO_3 is : | vedclass

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Question

(A) Boric acid $(H_3BO_3)$ contains three $OH$ groups,but it acts as a monobasic Lewis acid in aqueous solution.It does not dissociate to release $H^+

Vedclass · Accepted Answer

$1$

Vedclass · Answer

(A) Boric acid $(H_3BO_3)$ contains three $OH$ groups,but it acts as a monobasic Lewis acid in aqueous solution.It does not dissociate to release $H^+$ ions.Instead,it accepts a lone pair of electrons from $OH^-$ ions present in water to form the $[B(OH)_4]^-$ complex ion.The reaction is: $H_3BO_3 + H_2O \rightleftharpoons [B(OH)_4]^- + H^+$.Since it releases one $H^+$ ion per molecule through this mechanism,its basicity is $1$.

List-$I$ (Group $13$ element)	List-$II$ (Metallic radius,$pm$)
$A$. $Al$	$I$. $135$
$B$. $Ga$	$II$. $143$
$C$. $In$	$III$. $170$
$D$. $Tl$	$IV$. $167$

Basicity of $H_3BO_3$ is :

Similar Questions

Aluminium chloride exists as a dimer, $Al_2Cl_6$, in the solid state as well as in solutions of non-polar solvents such as benzene. When dissolved in water, it gives:

Match the following:
List-$I$ (Group $13$ element) List-$II$ (Metallic radius,$pm$)
$A$. $Al$ $I$. $135$
$B$. $Ga$ $II$. $143$
$C$. $In$ $III$. $170$
$D$. $Tl$ $IV$. $167$

The correct answer is:

In the following reaction,assign the state for the underlined atom for the product of complete hydrolysis at $R.T.$:
$H_4\underline{B}_2O_6 + H_2O \longrightarrow H_3BO_3 + H_2O_2$

Inorganic graphite is

The correct Lewis acidity order of $BX_3$ is:

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