1) Which of the following oxides is strongly basic? A) Tl2O B) B2O3 C) Al2O3 D) Ga2O3 Answer: Option BExplanation:On moving down the group, the nature of the oxides of group 13 elements changes from weakly acidic to amphoteric and amphoteric to basic. Tl2O in aqueous solution gives TlOH which is soluble and has a strong base.
