JEE MAIN - Chemistry (2017 (Offline) - No. 12)
In the following reactions, ZnO is respectively acting as a/an :
(a) ZnO + Na2O $$\to$$ Na2ZnO2
(b) ZnO + CO2 $$\to$$ ZnCO3
(a) ZnO + Na2O $$\to$$ Na2ZnO2
(b) ZnO + CO2 $$\to$$ ZnCO3
base and base
acid and acid
acid and base
base and acid
Explication
Zinc oxide (ZnO) when react with Na2O it act as acid while with CO2 it act as base. Therefore, it is an amphoteric oxide.
(a) ZnO + Na2O $$\to$$ Na2ZnO2
Acid Base Salt
(b) ZnO + CO2 $$\to$$ ZnCO3
Base Acid Salt
(a) ZnO + Na2O $$\to$$ Na2ZnO2
Acid Base Salt
(b) ZnO + CO2 $$\to$$ ZnCO3
Base Acid Salt