1.CuO+H2SO4=CuSO4+H2
CuSO4+Zn=ZnSO4+Cu
2.ZnO+2HCl=ZnCl2+H2
ZnCl2=Zn+Cl2
3.PbO+2HNO3=Pb(NO3)2+H2O
3Pb(NO3)2+2Al=2Al(NO3)3+3Pb
4.Ag2O+H2SO4=Ag2SO4+H2O
Ag2SO4+Zn=ZnSO4+Ag
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Answers & Comments
1.CuO+H2SO4=CuSO4+H2
CuSO4+Zn=ZnSO4+Cu
2.ZnO+2HCl=ZnCl2+H2
ZnCl2=Zn+Cl2
3.PbO+2HNO3=Pb(NO3)2+H2O
3Pb(NO3)2+2Al=2Al(NO3)3+3Pb
4.Ag2O+H2SO4=Ag2SO4+H2O
Ag2SO4+Zn=ZnSO4+Ag