why do Copper and Aluminium loss their sine after regular use
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some metals often lose their shine and appear dull after some time .why? Answer: ... Metals like iron, alluminium etc. reacts with moist air and get oxidised and they lose their shine.
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silver and copper lose their shine when exposed to air.name the substance formed on their surface in each case. tarnished copper vessels are cleaned with tamarind juice. aluminium is more reactive than iron yet there is less corrosion of aluminium as compared to iron when botyh are exposed to air.
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