Question

Why does copper wore takes bluish green colour when we heat it in a gas stove?

Answer 1

Explanation:

The reducing region of the flame is produced with low amounts of oxygen. This corresponds to the inner region of the Bunsen flame. If the burner is turned up to high, the flame is a blue color.

Answer 2

Copper is a metal and metals react with oxygen to get oxidized which form their oxide.

In same way copper react with oxygen and become oxidized

So

when we heat copper it react with oxygen and form oxide these oxidized copper is green in colour

hence, when we heat copper it takes bluish green colour.