Amphoteric hydroxides react with both alkalies and acids. Which of the following Group 2 metal hydroxides is soluble in sodium hydroxide?
Amphoteric hydroxides are compounds which can behave both as an acid and base. Beryllium hydroxide is amphoteric in nature as it reacts with acid and alkali both. Beryllium hydroxide reacts with sodium hydroxide to form beryllate ion which is soluble in the same. The reaction is given as
Be(OH)2 + 2OH–→ [Be(OH)4]2–
Hence, the correct answer is (i).