Question

Na---->Na2O--->NaOH--->Na2ZnO2--->Na2SO3--->SO2<---Cu
Cu(NO3)2--->Cu--->Cu(NO3)2--->Cu (OH)2---> CuO-->Cu-->SO2--->K2SO3

Answer 1

Na + O2 = Na2O2+ Na=Na2O+ H2O=NaOH + H2 
NaOH + HCl= NaCl+H2O NaCl = Na + Cl 

CuSO4 + Fe= FeSO4 + Cu+O2=CuO+HNO3 = CuNO3+ H2O+ Fe(OH)2=Fe(NO3)2+Cu(OH)2