Question

Which of the following diffuses fastest and which the slowest? Solid, Liquid and Gas. Give reasons for your answer.

Answer 1

Diffusion

• Spreading or movement of particles of substances from the region of higher concentration to the region of lower concentration.

Solid

• Particles of solids are tightly packed.
• restriction in the movement of particles from their positions.
• Hence the rate of diffusion is slow.

Liquid

• Molecules of liquid are present at a certain distance from each other.
• particles can move from one place to another easily.
• diffusion of liquid takes place at a medium pace.

Gas

• Gas particles are at a higher distance from each other as compared to solids and liquids.
• Particles can move fastly and freely.
• Hence diffusion of gas is fastest than solid and liquid.

Therefore, rate of diffusion is fastest in gas and slowest in solids.