An element of group-2 forms covalent oxide which is amphoteric in nature and dissolves in water to give an amphoteric hydroxide. Identify the element and write chemical reactions of the hydroxide of the element with an alkali and an acid.

An element of group-2 forms covalent oxide which is amphoteric in natu

1.	An element of group-2 forms covalent oxide which is amphoteric in nature and dissolves in water to give an amphoteric hydroxide. Identify the element and write chemical reactions of the hydroxide of the element with an alkali and an acid.
Answer» Solution :In group 2, Be is the only ELEMENT which gives COVALENT oxide Bel, which is AMPHOTERICIN nature. The rest elements of this group give ionic oxides which are BASIC in nature. Beo dissolves in water and gives sparingly soluble hydroxide which reacts with acid and base to give salt `BeO+H_(2)O to underset("Beryllium hydroxide")(Be(OH)_(2))` `Be(OH)_(2)`is AMPHOTERIC hydroxide. So it is soluble in both acid and base. In produces tetra hydroxide beryllate `(Z^(-))` ionon salublizing in NaOH like alkali solution. `2NaOH_((aq)) +Be(OH)_(2(s)) to underset("hydroxidoberyllate")underset("Sodium tetra")(Na_(2)Be(OH)_(4(aq)))` It produces beryllium salt on reaction with acid. `Be(OH)_(2) +H_(2)SO_(4) underset("Beryllium sulphate")(to BeSO_(4)+2H_(2)O)`