What is rancidity? Mention two methods to prevent it.

Rancidity is the oxidation of fats and oils in food, resulting in bad smell, unpleasant taste, and colour change, making food unfit for consumption.

Two Methods to Prevent Rancidity:

1. Antioxidants BHA or Vitamin E is added to inhibit oxidation.
2. Nitrogen flushing packets of chips are filled with nitrogen gas instead of air.

Other methods: refrigeration, airtight containers, vacuum packaging.

Rancidity is fat oxidation causing spoilage, and it is prevented using antioxidants or by replacing air with inert gases in packaging.