Aluminum is above iron in the electrochemical series, yet iron corrodes easily on exposure to air while aluminium does not. This is because aluminium

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A. has a lower density than iron
B. is a better conductor than iron
C. does not corrode spontaneously
D. forms thin layer of inert oxide in moist air
E. forms amphoteric oxides while iron does not

Correct Answer:

Option D – forms thin layer of inert oxide in moist air

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