Chemistry - Complete Pblock- Question with Solution | TestHub

$\mathrm{M}{\mathrm{g}}_3{\mathrm{B}}_2+\mathrm{H}\mathrm{C}{\mathrm{l}}_{\left(\mathrm{a}\mathrm{q}\right)}\to \underset{\left(\mathrm{X}\right)}{{\mathrm{B}}_2{\mathrm{H}}_6}+\mathrm{M}\mathrm{g}\mathrm{C}{\mathrm{l}}_2$
$\underset{\left(\text{X}\right)}{{\text{B}}_{\text{2}}{\text{H}}_{\text{6}}}\text{+}{\text{3H}}_{\text{2}}\text{O}\to \underset{\text{(Y)}}{{\text{H}}_{\text{3}}{\text{BO}}_{\text{3}}}\text{+}{\text{3H}}_{\text{2}}$
${\text{B}}_2{\text{H}}_6+3{\text{O}}_2\to {\text{B}}_2{\text{O}}_3+3{\text{H}}_2\text{O}$
$\underset{\left(\mathrm{Y}\right)}{{\mathrm{H}}_3\mathrm{B}{\mathrm{O}}_3}\stackrel{\mathrm{\Delta }}{\to }{\mathrm{B}}_2{\mathrm{O}}_3$
In Y, B completes it octet by removing${\mathrm{H}}^{+}$from water molecule.
$\text{B}{\left(\text{O}\text{H}\right)}_3+{\text{H}}_2\text{O}\stackrel{}{\rightleftharpoons }{\left[\text{B}{\left(\text{O}\text{H}\right)}_4\right]}_{(\text{a}\text{q})}^{-}+{\text{H}}_{(\text{a}\text{q})}^{+}$