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Câu 1:Trong các oxit sau oxit nào là oxit ba zơ. a)CaO và No b)NO2 và CO c)CuO và FeO d)ZnO và CO2 Câu 2:Trong các phản ứng sau phản ứng nào là phản ứng phân hủy. a)2H2 + O2 -> 2H2O b)KClO3 -> 2KCl + 3O2 c)2Mg + O2 -> 2MgO d)Zn + 2HCl -> ZnCl2 + H2 Câu 3:Trong các phản ứng sau phản ứng nào là phản ứng hoá hợp: a)CaO + H2O -> Ca(OH)2 b)C2H6O + 3O2 -> 2CO2 + 3H2O c)2KMnO4 -> K2MnO4 + MnO2 + O2 d)Zn + 2HCl -> ZnCl2 + H2
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