Question

which substance gets oxidised when the food becomes rancid ?
i. oil in the food
ii. spices in the food
iii. Salt in the food
iv. all the ingredient​

Answer 1

The correct answer is option (i) oil in food.

• Rancidity is a term that is used to describe the development of malodor and foul taste due to the oxidation of lipids or fat present in food items.
• Rancidity can also affect the nutritional value of food.
• This process of degradation of lipids is known as rancidification.
• It is of two types - Oxidative and Hydrolytic.
• Oxidative rancidification occurs by the break down of covalent bonds of unsaturated fatty acids present in food by free radicals. This reaction is catalyzed by sunlight.
• Resulting in the formation of ketones, fatty acids, and short chains aldehydes.
• This type of rancidity of food products can be prevented by the addition of antioxidants, light-proof packaging of food products, or storing in oxygen-free or air-tight containers.
• Hydrolytic rancidity occurs when triglycerides get hydrolyzed to form free fatty acids.
• This reaction occurs in the presence of a catalyst such as lipase enzyme, acidic or alkaline condition.

So, the oil present in food gets oxidized when food becomes rancid.

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