why eatables preferably packed in aluminium foils.
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Explanation:
1) Aluminium is a good conductor of heat therefore when we wrap hot food in the aluminium foil it keeps the food warm.
2) Aluminium reacts with present O2 and forms a layer of aluminium oxide (Al2O3) on it. Once the lead is formed aluminium farther does not react with O2 and keeps the food safe from other possible reactions.
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