Question

In an experimental set-up, a dye was placed at the bottom of a beaker filled with water as shown in figure A, below. After some time, the entire water in the beaker got coloured uniformly, as shown in figure D.
If all the dark shaded molecules in A are tightly enclosed in a cell membrane, what will be the nature of movement of the molecules, if any?

Answer 1

As the concentration of solvent molecules is more in the left side of the figure A. The cell membrane will act as semi-permeable membrane and will allow only the solvent molecules of water to move towards the solute particles. So the solvent molecules will move towards the solute particle. This will show the phenomenon or process of osmosis.