Rancidity: Why Do Foods Turn Rancid?

The video explains rancidity, a process that causes food spoilage due to chemical reactions involving fats and oils. It describes the chemical structure of fatty acids and the steps of rancidity reactions, including initiation, propagation, and termination. The video also covers two types of rancidity: oxidative and hydrolytic, and discusses factors like oxygen, microorganisms, and temperature that affect rancidity. Finally, it suggests methods to prevent rancidity, such as using antioxidants and proper storage.

What is the primary reason nitrogen gas is used in chip bags?

• To add flavor to the chips

• To keep the chips crispy

• To stop the chips from reacting with fats and oils

• To prevent the chips from becoming soggy

What is a radical in the context of rancidity reactions?

• A molecule that does not react

• A molecule with an unpaired electron

• A stable molecule

• A molecule with paired electrons

Which type of rancidity involves oxygen causing damage to food?

• Hydrolytic rancidity

• Microbial rancidity

• Oxidative rancidity

• Thermal rancidity

What is a common result of hydrolytic rancidity?

• Release of free fatty acids

• Formation of toxic compounds

• Destruction of vitamins A & E

• Change in food color

Which of the following is a natural antioxidant that can prevent rancidity?

• Vitamin D

• Vitamin C

• Vitamin B12

• Vitamin K