Question

Tanishing of copper is which change physical or chemical​

Answer 1

Answer:

Tarnishing is properly considered a chemical change.

Explanation:

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Answer 2

Chemical change is characterized by the formation of new substances, and the making and breaking of chemical bonds. When a metal tarnishes, typically copper, brass, silver, aluminum, or magnesium, it reacts with atmospheric oxygen to form a thin oxide coating. When iron tarnishes, we call the phenomenon
rusting
. Some metals, particularly gold, are very resistant to tarnishing, and this is one of the reasons why gold is so valued as an ornamental metal.



So when copper tarnishes to form CuO it is oxidation reaction
As which is. CHEMICAL CHANGE