Question

to prepare copper oxide and to show the redox reaction of copper oxide with hydrogen gas​

Answer 1

Answer:

It's a type of chemical reaction in which the oxidation number of molecule, atom, or ion changes by the gaining or losing of electrons.

(in the reaction above, see the image attached above)

=> in this reaction, CuO is changing into cu.

That's oxygen is being removed from cu.

And On the other hand H2 is changing into H2O

Answer 2

Answer: From the reaction, it is seen that oxidation state of Cu is changing from +2 to 0 and hydrogen from 0 to +1.

Hence, hydrogen is oxidized while copper is reduced.

Explanation:

Hope it helps :)