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Which main chemical reaction causes the change in taste and smell during rancidity of oils and fats?

Answer and explanation

Correct answer: Oxidation of oils and fats by atmospheric oxygen

Rancidity is mainly caused by oxidation of unsaturated oils and fats when they react with oxygen in air. The oxidation products, including unpleasant-smelling compounds, change the original taste and odour. Hence option A is correct. Reduction is the opposite type of redox change, neutralisation requires an acid-base reaction, and displacement with a metal is not the normal cause of rancidity. Antioxidants and airtight storage can slow this oxidation.

Related tags

Chemical Reactions And EquationsChemical Substances – Nature And BehaviourChemical Substances Nature And BehaviourScience

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