Chemistry - Complete Pblock- Question with Solution | TestHub

Boron is not attacked by HCl; whilst Al reacts with HCl to from$\mathrm{A}\mathrm{l}\mathrm{C}{\mathrm{l}}_3$and${\mathrm{H}}_2\left(\mathrm{g}\right)$.

A.$4\mathrm{B}+3{\mathrm{O}}_2\to 2{\mathrm{B}}_2{\mathrm{O}}_3$

$4\mathrm{A}\mathrm{l}+3{\mathrm{O}}_2\to 2\mathrm{A}{\mathrm{l}}_2{\mathrm{O}}_3$

B. Halides of both are electron deficient, therefore, act as Lewis acids.

C.$2\mathrm{B}+{\mathrm{N}}_2\to 2\mathrm{B}\mathrm{N}$

$2\mathrm{A}\mathrm{l}+{\mathrm{N}}_2\to 2\mathrm{A}\mathrm{l}\mathrm{N}$