Zinc is used to protect iron from corrosion because zinc is
A. more electropositive than iron
B. cheaper than iron
C. a bluish white metal
D. a good conductor of heat and electricity
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Zinc is used to protect iron from corrosion because zinc is
A. more electropositive than iron
B. cheaper than iron
C. a bluish white metal
D. a good conductor of heat and electricity
Zinc is used to protect iron from corrosion because zinc is
A. more electropositive than iron
B. cheaper than iron
C. a bluish white metal
D. a good conductor of heat and electricity
Correct option (a) more electropositive than iron
Explanation:
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.