Question

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Answer 1

Answer:

Rancidity refers to the complete or incomplete hydrolysis or oxidation of fats and oils when exposed to air, light, moisture, and bacterial activity; this generally occurs in food items making them undesirable for consumption.

Have you ever wondered why a bag of chips is always half full? It’s because of a concept called rancidity. No food items can retain their desirable qualities for a extended period of time. They become spoiled by many chemical actions, and rancidity is one such action. When food items containing fats and oils are exposed to air or moisture, they become spoiled. To prevent this spoilage in chips, nitrogen gas is flushed into the chip bags. Nitrogen is used in this case because it does not react with fats and oils.

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Answer 2

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Explain the term ‘rancidity’ with an example. How can rancidity be prevented?

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When oils and fats get oxidised, they become rancid and a change in their smell, taste takes place.

The following are the ways to prevent rancidity :

• Antioxidants should be added to food items fats as they prevent the food items from getting oxidised.

• Flushing out oxygen and adding of an inert gas like nitrogen also helps in preventing rancidity.

• Keeping the food items in air-tight containers also helps to reduce the process of rancidity.