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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.    

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.

 

 
 
 
 
 

Answers (1)

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

Observable changes –

1. Change in taste

2. Change in smell

Three ways of prevention :- i) Addition of antioxidants / substance which prevent oxidation. ii) Keeping food in air tight containers. iii) Use of nitrogen gas in packaged food

 

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Safeer PP

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