Question

Why does edible oils shows rancidity when stored for long period

Answer 1

edible oils show rancidity when stored for a long period of time because it undergoes oxidation as it is exposed to oxygen .

Answer 2

When edible oil is stored for a long time it undergoes oxidation and become s rancid.

Fats in the oil have C=C double bond in their structure .These bonds r broken by oxygen that's why edible oil becomes rancid.