What happens when food materials containing fats and oils are left for a long time? List two observable changes and suggest three ways by which this phenomenon can be prevented.


When food materials containing fats and oils are left for a long time they become rancid.

Two observable changes are given below:
  1.  Change in taste
  2. Change in smell
Three ways of prevention:-
  1. Addition of antioxidants/substance which prevents oxidation.
  2. Keeping food in air-tight containers. 
  3. Use of nitrogen gas in packaged food.

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Updated on: 10-Oct-2022

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