Answer: Norethindrone.
- A Norethindrone
- B Chloroxylenol
- C Salvarsan
- D Bithionol
Correct answer: A. Norethindrone
Explanation: Norethindrone is a synthetic progesterone derivative used in oral contraceptives. Chloroxylenol and bithionol are antiseptics.
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.