which chimcal used copper coin torch bulb failed
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Answer:
tungsten is the snswer
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Explanation:
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A copper coin is dipped into a solution of sodium zincate in contact with zinc metal. The coin is plated with zinc and appears silver in colour. The plated coin is held in a Bunsen flame for a few seconds and the zinc and copper form an alloy of brass. The coin now appears gold.
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