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Q.

Aluminium is more reactive than iron. But aluminium is less easily corroded than iron because

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a

aluminium is a noble metal

b

oxygen forms protective oxide layer

c

iron undergoes reaction easily with water

d

iron forms both acid moo and divalent ions

answer is B.

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Detailed Solution

Aluminium is less easily corroded than iron, due to the formation protective Al2O3 oxide layer on its surface with atmospheric oxygen.
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