Question

1. in which process do particles move closer together but remain in motion?

a condensation
b diffusion
c evaporation
d freezing

2. which state is an example of diffusion ?

a A kitchen towel soaks up some spilt milk.
b Ice cream melts in a warm room
c Pollen from flowers is blown by the wind
d The smell of cooking spreads through a house


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Answer 1

Answer:

a) diffusion

c ) pollen from flower is blown by the wind

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Answer 2

1. In diffusion, particles move closer but remain in motion. (b)

2. Smell of cooking spreading through the house is an example of diffusion. (d)

• Diffusion is the process by which solute molecules move from a region of their higher concentration to a region of lower concentration.
• The particles are in continuous motion as they occupy regions of lower concentrations to attain equilibrium concentration.
• The smell of food cooking swiftly permeates a room full of still air. This is an example of diffusion of gases.