Question

Have you ever tasted or smelt the fat/oil containing food materials left for a long time?

Answer 1

When the food containing oil and fat are left for a long time they become rancid.Their smell and taste changes.Thus we can say that oxidation reactions in food materials that were left for a long period are responsible for spoiling of food.

Answer 2

Answer:

Food materials containing fats and oils changes their taste and smell due to a process called rancidity.

Rancidity is a process in which air reacts with fats and oils which changes the smell and taste of food.

To prevent rancidity the food must be packed in air tight containers.

In chips packets nitrogen is filled inside of the packet due to make a inert atmosphere inside.