[JEE Orissa 2004, 05]
A) ZnO
B) CaO
C) BaO
D) SrO
Correct Answer: A
ZnO is an amphoteric oxide,
$ ZnO+H_2SO_4\to ZnSO_4+H_2O $
$ ZnO+2NaOH\to Na_2ZnO_2+H_2O $
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