Question

Name the following:
Movement of molecules of a substance from their higher concentration to lower concentration when they are in direct contact.

Answer 1

Diffusion:

1. It is the movement of molecules of a substance from the region of higher concentration to the region of lower concentration without a semi-permeable membrane.
2. The movement of the molecules in diffusion is passive, hence, no energy is required.
3. Diffusion takes place along a concentration gradient which exists until the diffused substance is evenly distributed throughout the whole region.
4. Diffusion involves the movement of both solute and solvent molecules