Chemistry - Complete Pblock- Question with Solution | TestHub

Acidic strength of hydroxides$\left[\mathrm{M}\right(\mathrm{O}\mathrm{H}{)}_3]$decreases down the group as follows
$\mathrm{B}(\mathrm{O}\mathrm{H}{)}_3>\mathrm{A}\mathrm{l}(\mathrm{O}\mathrm{H}{)}_3>\mathrm{G}\mathrm{a}(\mathrm{O}\mathrm{H}{)}_3>\mathrm{I}\mathrm{n}(\mathrm{O}\mathrm{H}{)}_3>\mathrm{T}\mathrm{I}(\mathrm{O}\mathrm{H}{)}_3$
$\mathrm{B}(\mathrm{O}\mathrm{H}{)}_3$is known as orthoboric acid,${\mathrm{H}}_3\mathrm{B}{\mathrm{O}}_3$.
$\text{NaOH+B}{\left(\text{OH}\right)}_3\to \text{Na}\left[\text{B}{\left(\text{OH}\right)}_4\right]$
or$\underset{\text{ Sod}\text{.}\text{metaborate }}{{\text{NaBO}}_2}+2{\text{H}}_2\text{O}$