Rancidity of food is caused by:
AOxidation of fats and oils
BReduction of proteins
CDecomposition of water
DHydrogenation of vitamins
Answer & Solution
Correct answer: A. Oxidation of fats and oils
1. Fats and oils in food react with atmospheric OXYGEN over time.
2. This OXIDATION makes them smell and taste rancid (off-flavour).
3. Prevented by antioxidants (BHA, BHT), nitrogen flushing, refrigeration, sealed packaging.
_Source: NCERT Class 10 Science Ch 1 §1.4 Rancidity_
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