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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:
- Change in taste
- Change in smell
Three ways of prevention:-
- Addition of antioxidants/substance which prevents oxidation.
- Keeping food in air-tight containers.
- Use of nitrogen gas in packaged food.
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