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Why do foods containing oils and fats remain unspoiled for longer when packed in nitrogen-filled packets?

Answer and explanation

Correct answer: Nitrogen displaces oxygen, slowing the oxidation of oils and fats.

Oils and fats react with oxygen in air and undergo oxidation, causing rancidity. Filling the packet with nitrogen greatly reduces the available oxygen, so oxidation occurs more slowly and the food remains fresh for longer. Unlike option C, nitrogen does not reduce or saturate oils and fats under normal packaging conditions.

Related tags

ScienceClass 10Chemical ReactionsOxidationRancidityNitrogen PackagingFood Preservation

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