Question

what happens when food meterials containg fats and oil are left for a long time? list two observable changes and suggest three ways by which his phenomenon can be prevenyed.​

Answer 1

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.

Answer 2

The food will get rancid. Two observable changes:

1) bad smell from the food

2) bad taste of the food

Three ways:

1) By flushing food with nitrogen.

2) By adding antioxidants in the food.

3) Keep the food away from sunlight