The hydroxide of aluminium is more acidic than that of boron.
The hydroxide of boron is basic, while that of aluminium is amphoteric.
The hydroxide of boron is acidic, while that of aluminium is amphoteric.
The hydroxide of boron and aluminium are amphoteric
Boron is the only non-metal in group-13 and its hydroxide is acidic. Boron hydroxide is formed when borax is treated with acid in the presence of water. On heating, boric hydroxide forms meta-boric acid.
Aluminum hydroxide is amphoteric because it reacts with both acid and base.