alleryOld or leftover cooking oil develops a foul odour and changed taste when left in air for a long time. This air-oxidation of oils and fats in food is called:
Adecomposition
Bcorrosion
Celectrolysis
Drancidity
Answer & Solution
Correct answer: D. rancidity
1. Oils, ghee and fried food left in air undergo oxidation by atmospheric oxygen.
2. This produces a foul odour and bad taste, a condition called rancidity.
3. Corrosion is the oxidation-damage of metals, not of food.
4. Decomposition and electrolysis are different processes, so those options are wrong.
_Source: Balbharati (Maharashtra Board) Class 10 Science & Technology, Ch 3 "Chemical Reactions and Equations", p.54_
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