Question

Identify the substances that are oxidized and reduced in reaction. ZNH4 +H2SO4 >(NH4) SO4 +H2, CuO +H2 >Cu +H2O, C+PbO2 >CO2 +Pb, H2S +Cl2 >2HCl +S

Answer 1

oxidation ...... reduction
N. H
h. cu
c. pb
s. cl

Answer 2

1)ZNH4+H2SO4=(NH4)SO4+H2
NH- oxidised and H2- reduced

2)CUO+H2=CU+H2O
H2- oxidised and CU- reduced

3)C+PbO2=CO2+Pb
C- oxidised and Pb- reduced

4)H2S+Cl2=2HCl+S
H2- oxidation and S- reduced

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