Aluminium is reactive metal so why it is use for packing food
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As a layer of oxide is formed on aluminium which prevents from corrosion. Therefore the food indgredeint do not react with aluminium.
Aluminium is quite reactive, when it is kept in air or oxygen for some time, the upper surface get converted into its oxide called aluminium oxide (Al2O3), which gets deposited as a thin coating on the surface of the metal. This aluminium oxide is passive which means that it is not reactive. Therefore, this metal is used for packing food articles which do not get spoiled in the foil.