Question

A hard shell of an egg was dissolved in HCl. The egg was then placed in a concentration solution of NaCl. What will happen?

(a) The egg will shrink.

(b) The egg will swell.

(c) The egg will become harder.

(d) There will be hardly any visible change.

Answer 1

(a) The egg will shrink.

Egg shells are basically calcium carbonate, if you put them in HCl it will make pores and will make it a kind of semipermeable membrane. since water moves from lower solute concentration to higher which we call it osmosis, so water moves out from egg to salt solution making the egg to shrink.