Galvanized iron refers to iron coated with:
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Answer: B
Galvanized iron is iron coated with zinc.
Galvanizing, usually by dipping the iron or steel in molten zinc, protects it from rusting in two ways: the zinc layer seals the surface, and because zinc is more reactive than iron it corrodes sacrificially in preference to the iron even where the coating is scratched.
Iron coated with tin is tin plate, used for food cans. Chromium is applied by electroplating for a hard, bright finish. Germanium is a semiconductor element and is not used as a protective coating.
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