CAIE IGCSE Chemistry 1 States of Matter Topic Practice

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Question 1

[Maximum number: 1]

A compound, X , has a melting point of 71∘C71^{\circ} \mathrm{C} and a boiling point of 375∘C375^{\circ} \mathrm{C}.
Which statement about X is correct?

A

It is a liquid at 52∘C52^{\circ} \mathrm{C} and a gas at 175∘C175^{\circ} \mathrm{C}.

B

It is a liquid at 69∘C69^{\circ} \mathrm{C} and a gas at 380∘C380^{\circ} \mathrm{C}.

C

It is a liquid at 75∘C75^{\circ} \mathrm{C} and a gas at 350∘C350^{\circ} \mathrm{C}.

D

It is a liquid at 80∘C80^{\circ} \mathrm{C} and a gas at 400∘C400^{\circ} \mathrm{C}.

Question 2

[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 3

[Maximum number: 1]

In which state does 1dm31 \mathrm{dm}^{3} of methane contain the most particles?

A

gas at 100∘C100^{\circ} \mathrm{C}

B

gas at room temperature

C

liquid

D

solid

Question 4

[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}

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