Answer: antacid.
- A antibiotic
- B antacid
- C analgesic
- D antiseptic
Correct answer: B. antacid
Explanation: Antacids such as magnesium hydroxide neutralise excess hydrochloric acid in the stomach.
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.