Question

write difference between rancidity and corrosion

Answer 1

The phenomenon by which metals are slowly eaten away by the reaction of air ,water and chemicals present in the atmosphere , is called corrosion.
where as
Rancidity is a slow process of oxidation of oil and fat present in the food materials resulting in the change of smell and taste in them ...

Answer 2

when a metal is attacked by substances around it such as moisture,acid etc. it is said to corrode and this process is called corroison