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5 May, 09:26

Give reasons 1) copper utensils and sheets become blackish after some days

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  1. 5 May, 09:55
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    Copper reacts with the oxygen in the air and this is known as oxidation and is a chemical change. The copper reacts with oxygen and gets oxidised to form a blackish coating on the sheet. Cu+O2->CuO ...

    This is a combination reaction. #answerwithquality #BAL
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