i. Rancidity: The oxidation of oils and fats in foods resulting into a bad smell and bad taste is called rancidity.
ii. To prevent rancidity, substances called ‘antioxidants’ are added to food (that contains fats and oils.)
iii. Rancidity can also be prevented:
a. By flushing packets of food items like chips with nitrogen.
b. By storing the food inairtight container to slow down the process of oxidation.