What is rancidity ? How can you prevent if ?

Explanation

1) Rancidity : Oxidation reactions in food material that were left for a long period are responsible for spoiling of food. This process is called Rancidity.
2) Effects of rancidity : If food is oxidized rancidity takes place causes undesirable odour, flavour and taste.
3) Prevention of rancidity :
4) Rancidity can be prevented by filling of nitrogen to cut the contact of oxygen to the food materials. For example : `N_(2)` fills in lays, kurkure chips packets etc.