Question

For example, when copper (cu) is heated in the presence of air, it gets oxidised to form copper oxide (cuo)

Answer 1

Explanation:

Heated copper metal reacts with oxygen to form the black copper oxide. The copper oxide can then react with the hydrogen gas to form the copper metal and water. When the funnel is removed from the hydrogen stream, the copper was still be warm enough to be oxidized by the air again.

Answer 2

Answer:

When Copper (Cu) is heated , the  oxygen from the air combines with copper to form copper(II) oxide.

The colour of copper changes to black .

Therefore,

the coating formed on the surface of copper is copper oxide or cupric oxide (CuO).

Here is the chemical equation for the chemical reaction :-

                      heat

2Cu + O₂   --------------> 2CuO

This is also an example of oxidation .

Copper is the getting oxidised to CuO.

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