CAIE IGCSE Chemistry 1.2 Diffusion Topic Practice

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Covered syllabus points

1.2.1—Diffusion using kinetic particle1.2.2—Effect of relative molecular mass on

Question 1

[Maximum number: 1]

Which description of Brownian motion is correct?

A

random movement of particles due to bombardment by larger particles

B

random movement of particles due to bombardment by smaller particles

C

random movement of particles from a high concentration to a low concentration

D

random movement of particles from a low concentration to a high concentration

Question 2

[Maximum number: 1]

Which gas has the slowest rate of diffusion?

A

H2\mathrm{H}_{2}

B

NH3\mathrm{NH}_{3}

C

CH4\mathrm{CH}_{4}

D

CO2\mathrm{CO}_{2}

Question 3

[Maximum number: 1]

Which statements about diffusion are correct?

1 Aqueous ions cannot diffuse in water.
2 Diffusion is caused by the random movement of particles.
3 Particles spread out in all directions in diffusion.
4 Diffusion can only take place in solids and liquids.

A

1 and 2

B

1 and 4

C

2 and 3

D

3 and 4

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