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(a) Give reasonwhy copper is used to make hot water tanksbut steel (an alloy of iron) is not. (b). Explain why, the surface of some metals acquires a

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(a) Give reasonwhy copper is used to make hot water tanksbut steel (an alloy of iron) is not.
(b). Explain why, the surface of some metals acquires a dull appearance when exposed to air for a long time.
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(a) Copper does not corrode easily in the presence of water but steel rusts in the presence of water.
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