Q. 33

Name an element from Group 2 which forms an amphoteric oxide and a water soluble sulphate.

Answer :

The element from Group 2 is Beryllium. Beryllium reacts with oxygen to give BeO which is covalent in nature, unlike other elements of Group 2 which form ionic compounds. Beryllium oxide is amphoteric in nature unlike the other compounds which are basic in nature. Sulphates of Group 2 are soluble in water and BeSO4 is readily soluble in water. This is because of the hydration enthalpy of Be2+ ions being much higher than the lattice enthalpy of BeSO4.


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