Question

Why are food particle preferably packed in alluminium foil

Answer 1

Food particles are preferably packed in alluminium foil because the hot food which is wrapped in alluminium foil keeps the food hot and fresh.

Answer 2

Aluminium foil do not corrode in atmosphere even if kept for a long time because a protective coating of aluminium oxide (Al2O3) is formed on the surface of the foil and stops any further reaction of the metal with air and water thus food particles do not get spoiled.