Question

When a bottle of scent or ammonia is opened in one corner of a room, it can be smelled at the farthest corner after sometimes due to the process of diffusion. At this stage, an equilibrium is reached due to the same concentration in space. At this point,

• A. The movement of particles stops
• B. The movement of particles continues
• C. The movement of particles becomes very fast
• D. None of these

Answer 1

The correct option is B The movement of particles continues

Diffusion is the movement of molecules from an area of high concentration of the molecules to an area with a lower concentration. The difference in the concentrations of the molecules in the two areas is called the concentration gradient. Diffusion will continue until the concentration gradient has been eliminated. Since diffusion moves materials from an area of higher concentration to the lower. At the end result of diffusion is an equal concentration, or equilibrium, of molecules on both sides of the membrane. At equilibrium, the movement of molecules does not stop. At equilibrium, there is an equal movement of materials in both directions.

So the answer is option B 'the movement of particles continues'.