What is the purpose of coating iron with a thin layer of zinc?
A. To make it stronger.
B. To make is easier to polish.
C. To prevent its corrosion.
D. To increase its electrical conductivity
A. To make it stronger.
B. To make is easier to polish.
C. To prevent its corrosion.
D. To increase its electrical conductivity
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Answer:
Letter D
Explanation:
Galvanising is a method of rust prevention. The iron or steel object is coated in a thin layer of zinc. This stops oxygen and water reaching the metal underneath - but the zinc also acts as a sacrificial metal . Zinc is more reactive than iron, so it oxidises in preference to the iron object.
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