Why change in colour takes place whenever a chemical change occurs?
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When copper reacts with the elements (oxygen, water and carbon dioxide), it turns from its element color of reddish-brown to green. ... A similar reaction occurs when iron rusts: Iron oxide forms on its surface (oxidation) causing the iron to turn a reddish color.
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shahilamin10:
I didn't get the point....no could change to other color too ri8?
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