What is Rancidity? How is it caused?
The spoilage of food in such a way that it becomes unfit to eat is called rancidity.
It is caused by oxidation of fats and oils present in food.
It causes change in smell and taste of food
How to Prevent Rancidity
It can be prevented by preventing oxidation.
The following methods may be used:
Adding antioxidants to food
Antioxidants are substances which prevent oxidation.
Example: Phenolic compounds like Butylated hydroxyanisole (BHA) and Butylated Hydroxytoluene (BHT)
Keeping food in refrigerator
Refrigerator has low temperature, oxidation slows down at low temperatures
Storing food in airtight containers
In Airtight container,there is little exposure to oxygen,so there is low oxidation
Keeping food away from light
In absence of light, oxidation process slows down
Packaging food and oil in Nitrogen Gas
Bags of chips are flushed with Nitrogen
The Nitrogen gas prevents Oxygen from reaching the food and prevents oxidation
Intext Question -
NCERT Exercise - Q18, Q19, Q20