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Why does oily food kept in warm, open air spoil quickly?

Answer and explanation

Correct answer: Oxygen in air oxidises oils and fats, and warmth speeds up this process.

Oils and fats in oily food react with oxygen in air and undergo oxidation. This oxidation produces an unpleasant smell and taste; the process is called rancidity. Heat increases the reaction rate, so oily food becomes rancid faster in warm, open air. Option B is incorrect because warmth does not make fats unreactive; it can increase the rate of oxidation.

Related tags

Class 10 ScienceChemical ReactionsRancidityOxidation Of FatsFood Preservation

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