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Question:

The correct statements among I to III regarding group 13 elements oxides are:(I) Boron trioxide is acidic(II) Oxides of aluminium and gallium are amphoteric.(III) Oxides of indium and thallium are basic.

(I), (II) and (III)

(II) and (III) only

(I) and (III) only

(I) and (II) only

Solution:

Correct option is A. (I), (II) and (III)
All statements are correct.
B₂O₃ → acidic
Al₂O₃ and Ga₂O₃ are amphoteric oxides.
In and Tl oxides are basic in nature.
As we go down the group non-metallic character decreases and metallic character increases.