(b) Explain why, though aluminium is more reactive than iron, yet there is less corrosion of aluminium when both are exposed to air.

Solution:

(a)To keep the iron grill from rusting, it is painted on a regular basis.

(a) When aluminium comes into touch with air, it reacts and forms an oxide layer on its surface. As a result, when both are exposed to air, there is less corrosion of aluminium.