Question

What is rancid or rancidity

Answer 1

oxidation of fat and oils is known as rancidity. when fats and oils are oxidised the smell and taste changes.

Answer 2

Here is your answer in 2 parts

Part 1. When oil or ghee is left aside

for a long time or fried food is left aside for a long time it undergoes air oxidation and becomes rancid.

Part 2. Rancidity is chemical

decomposition of oils and fats. It spoils food materials that makes difficult for consumption.