Answer: They donate hydrogen atoms to free radicals formed during autoxidation, interrupting the chain reaction.
- A They lower the melting point of the fat, which slows down oxidation reactions kept at room temperature
- B They donate hydrogen atoms to free radicals formed during autoxidation, interrupting the chain reaction
- C They form a physical coating over the fat that limits how much oxygen reaches the fat molecules below
- D They gradually convert atmospheric oxygen into carbon dioxide near the surface of the stored fat or oil
Correct answer: B. They donate hydrogen atoms to free radicals formed during autoxidation, interrupting the chain reaction
Explanation: Antioxidants like BHT readily give up a hydrogen atom to the free radicals generated during the autoxidation of fats, terminating the chain reaction and slowing the development of rancidity.
The hydrophobic hydrocarbon tail of each soap/detergent molecule dissolves into an oily dirt droplet, while the hydrophilic (ionic) head stays in the surrounding water - trapping the grease inside a micelle that rinses away with water.
Concept context
Drugs and how they interact with biological targets, chemicals in food, and cleansing agents (soaps and detergents) - chemistry applied directly to daily life and healthcare.