Chemistry - Complete Pblock- Question with Solution | TestHub

${\mathrm{Bi}}_2{\mathrm{O}}_3$ is the most basic oxide because of higher reactivity with acid. $${\mathrm{Bi}}_2{\mathrm{O}}_3+6\mathrm{HCl}\to 2{\mathrm{BiCl}}_3+3{\mathrm{H}}_2\mathrm{O}$$ ${\mathrm{Al}}_2{\mathrm{O}}_3$ and ${\mathrm{Sb}}_2{\mathrm{O}}_3$ are amphoteric and ${\mathrm{SeO}}_2$ is acidic.