i) When the egg is first put in hydrochloric acid for some time, the egg cell which is made up of calcium carbonates, reacts with the acid and dissolves.

ii) When the same de-shelled egg is placed in a concentrated salt solution, the egg will shrink because of osmosis. Since, the concentrated salt solution is hypertonic, water will flow from inside the egg (lower salt concentration) to the outside (higher salt concentration). This will make the egg shrink.