Aluminium is a good roofing material because it

Assessment: WAEC SSCE - Chemistry - 2008 (Objective) Subject: Chemistry

Question 1 Report

Aluminium is a good roofing material because it

Answer Details
The answer is: "forms an oxide film over its surface which prevents corrosion". This is because when aluminium is exposed to air, it reacts with oxygen to form a thin layer of aluminium oxide on its surface. This oxide layer is tightly bound to the aluminium and acts as a barrier, protecting the underlying metal from further oxidation or corrosion. This makes aluminium a good roofing material, as it can resist the effects of weather and other corrosive elements over time.
Read lesson note on Metals And Their Compounds (JAMB)
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