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