Demonstration of Osmosis:
A thistle funnel whose mouth is covered with a semipermeable membrane, is filled with sucrose solution. It is kept inverted in a beaker containing water. The water will diffuse across sugar the membrane due to osmosis and raise the level of the solution solution in the funnel.

Explanation

A thistle funnel, whose mouth is covered with parchment paper, which acts as a semipermeable membrane, is filled with sucrose solution. The funnel is kept inverted in a beaker,containing water. The water from the beaker, enters or diffuse across the membrane from the region of water higher concentration to the water lower concentration (Sucrose Solution) through Semi Permeable membrane, by osmosis. This causes the raise of the level of solution in the funnel.