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InterviewSolution
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Explain why : (a) In the electrolysis of alumina using the Hall Heroult’s Process the electrolyte is covered with powdered coke. (b) During galvanization, iron sheets are coated with zinc during galvanization. |
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Answer» (a) It prevents burning of carbon anodes and prevents heat loss from the molten electrolyte. (b) Zinc forms a protecting coating on the surface of iron and hence prevents it from rusting. Zinc by itself form a protective layer of zinc oxide and hence does not tarnish. |
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