Answer Happy

1. Explain the following phenomena (a) A cucumber placed in concentrated brine (saltwater) shrivels into a pickle. (b) A carrot placed in fresh water swells in volume. 2. Time release drugs have the advantage of releasing the drug to the body at a constant rate so that the drug concentration at any time is not high enough to have harmful side effects or so low as to be ineffective. A schematic diagram of a pill that work on this basis is shown in Figure [Explain how it works. Semipermeable Elastic membrane impermeable Saturated membrane Naci Drug) Solution Rigid wall containing tiny holes Figure 1: Schematic of a time release drug capsule.