Chemistry - Complete d-block Question with Solution | TestHub

$\mathrm{CuO}\stackrel{{\mathrm{H}}_2}{\to }\mathrm{Cu}+{\mathrm{H}}_2\mathrm{O}$

Copper oxide undergoes reduction to form elemental copper and water. This is a redox reaction. Since oxygen is removed from the $\mathrm{CuO}$ it is undergoing reduction. And hydrogen is getting oxidised.