Chemistry - Complete Pblock- Question with Solution | TestHub

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${\text{B}}_2{\mathrm{O}}_3\to$acidic ,${\text{B}}_2{\mathrm{O}}_3$is an anhydride of Orthoboric Acid.
$\mathrm{A}{\mathrm{l}}_2{\mathrm{O}}_3$and$\mathrm{G}{\mathrm{a}}_2{\mathrm{O}}_3$are amphoteric, amphoteric oxides can react with acids as well as bases.
oxides of ln and Tl are basic.
As we move down the group basicity of oxides increases due to increase in metallic character of elements