Question

In equation CUO+H2--> CU+H2O identified, with reason in reduced substance

Answer 1

Copper is the getting reduced and hydrogen is getting oxidised

Answer 2

CuO is reduced as Cu → reduction
H2 is oxidized as H2O → oxidation
As H2 is more reactive than copper in the active series of metals, it takes O2 from CuO and forms H2O
Hence redox reaction takes place