Answer :

When we use old, left over cooking oil for making foodstuff, it is found to have foul odour called rancidity.

Rancidity is an oxidation reaction.


If food is cooked in such oil, its taste also changes.


When oils or fats are left aside for a long time, they undergo air oxidation and become rancid.


Rancidity in the food stuff cooked in oil or ghee is prevented by using antioxidants.


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