Which of the following metals could be used as sacrifical anode for preventing the corrosion of iron?

Assessment: WAEC SSCE - Chemistry - 2011 (Objective) Subject: Chemistry

Question 1 Report

Which of the following metals could be used as sacrifical anode for preventing the corrosion of iron?
Answer Details
To prevent the corrosion of iron, a more reactive metal can be used as a sacrificial anode. This metal will undergo oxidation instead of iron, and hence, protect it from rusting. Out of the given options, magnesium is the most reactive metal, followed by zinc and aluminium. Therefore, magnesium can be used as a sacrificial anode to protect iron from corrosion. Copper, lead, and silver are less reactive and cannot be used as sacrificial anodes for preventing the corrosion of iron.
Read lesson note on Metals And Their Compounds (JAMB)
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