• # question_answer 70)   Name an element of group 2 which forms an amphoteric oxide and a water soluble sulphate.

Beryllium Be forms amphoteric oxide, $BeO$and a water soluble$BeS{{O}_{4}}$. $\underset{Acidic}{\mathop{BeO}}\,+2NaOH\to N{{a}_{2}}Be{{O}_{2}}+{{H}_{2}}O$ $\underset{Basic}{\mathop{BeO}}\,+2HCl\to BeC{{l}_{2}}+{{H}_{2}}O$ $BeS{{O}_{4}}$is soluble in water as its hydration energy is more than lattice energy.