Discussion Forum



1)

Which of the following oxides is strongly basic?


A) $Tl_{2}O$

B) $B_{2}O_{3}$

C) $Al_{2}O_{3}$

D) $Ga_{2}O_{3}$

Answer:

Option B

Explanation:

On moving down the group, the nature of the oxides of group 13 elements changes from weakly acidic to amphoteric and amphoteric to basic. $Tl_{2}O$ in aqueous solution gives $TlOH$  which is soluble and has a strong base.