You must have tasted or smelt the fat containing food material left for a long time. Such foods taste and smell bad. What is the reason for the reason for this ? Name to the phenomenon responsible for it. List two measures for its prevention.

You must have tasted or smelt the fat containing food material left fo

1.	You must have tasted or smelt the fat containing food material left for a long time. Such foods taste and smell bad. What is the reason for the reason for this ? Name to the phenomenon responsible for it. List two measures for its prevention.
Answer» Solution :Food material left for a long time is oxidised by atmospheric oxygen. This changes the SMELL and taste of food. Measures for PREVENTION : (i) Keep the food in AIR -- tight containers. (ii) Flush the food packets with nitrogen GAS before SEALING.