Question

you must have tasted or smelt the fat containg food material left for a long time .such food taste and smell bad .what is the reason for this? name the phenomenon responsible for it.list two measures for it.list 2 measures for its prevention

Answer 1

 If the fat containg food material left for a long time then it reacts with the oxygen present in the air and get oxidised.
the phenomenon is known as rancidity.
measures for its prevention are:
1)by refrigerating the food items.
2)by adding anti -oxidants.
3)by using air tight containers.