Question : Which metal does not undergo corrosion due to the formation of oxide layer?
Option 1: Copper
Option 2: iron
Option 3: Aluminium
Option 4: Znic
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Correct Answer: Aluminium
Solution : The correct answer is Aluminium.
Aluminium is a metal and it has an atomic number of 13. It is highly chemically reactive but it does not corrode because it reacts with atmospheric oxygen and forms a protective layer of aluminium oxide, which prevents it from further corrosion. Formation of aluminium oxide is the reason for the blackening of aluminium utensils.
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