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.

1.  Change in taste
2. Change in smell

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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