Why aluminum foil are used to …
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Ashutosh Kumar 8 years ago
Aluminium is a good conductor of heat, on the other hand its is a bad radiator of heat, therefore when we wrap hot food in the aluminium foil it keep the food warm.
Aluminium on reaction with oxygen forms a layer of Al2O3 which renders the metal passive and protects it from further reaction. Hence it is not harmful for us.
Thus, aluminium doesn't react with our food therefore we can use it for wrapping purposes. However, we should not pack pickle in aluminium foil as it contains citric acids, which reacts with Al foil and hence can harm us.
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