In the reaction $C u O + H_{2} \to C u + H_{2} O$ which substance gets oxidised and which gets reduced?
Give one more example of such type of reaction.

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Solution

An oxidation-reduction (redox) reaction is a type of chemical reaction that involves a transfer of electrons between two species. In redox reaction the oxidation number of a molecule, atom, or ion changes by gaining or losing an electron.
In the reaction : $C u O + H_{2} ⟶ C u + H_{2} O$
n the reaction $H_{2}$ is oxidized since it has lost electrons and $C u$ is reduced since it has gained electrons.

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