[MCQ] Chemistry Level 4

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CHEMISTRY Brilliant MCQ

KINETIC PARTICLE THEORY

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Question 1 of 6

1. Question
1 point(s)
The particles in substance Z are widely spaced and able to move freely.

Z changes to a state in which the particles are in contact but still able to move freely.

What is this change called?
- condensation
- evaporation
- freezing
- melting
Correct

Incorrect

Hint

Descriptions of the solid, liquid and gaseous states of matter, in terms of arrangement and movement of particles
Question 2 of 6

2. Question
1 point(s)
Bromine is a liquid at 20°C.

What is the melting point and the boiling point for bromine?
- A
- B
- C
- D
Correct

Incorrect

Hint

To exist as a liquid at room temperature, a substance must have melted (melting point lower than room temperature) and not boiled (boiling point higher than room temperature)
Question 3 of 6

3. Question
1 point(s)
Two gases, P and Q, were separately released in a laboratory on a cold day. The experiment was repeated on a hot day. The time taken for the gases to reach the opposite end of the laboratory was recorded for each experiment.

The relative molecular mass of gas P was 34 and the relative molecular mass of gas Q was 64.

Which gas on which day would reach the end of the laboratory in the shortest time?
- A
- B
- C
- D
Correct

Incorrect

Hint

Recall qualitatively the effect of relative molecular mass on the rate of diffusion and the dependence of rate of diffusion on temperature
Question 4 of 6

4. Question
1 point(s)
Which row correctly shows the order of the rates of diffusion of the gases ammonia, carbon dioxide and hydrogen bromide?
- A
- B
- C
- D
Correct

Incorrect

Hint

Rate of diffusion is dependent of the molecular mass.
Question 5 of 6

5. Question
1 point(s)
The stopper was removed from a bottle containing perfume X and the time taken for the smell to reach the opposite side of the room was noted.

The experiment was repeated using perfume Y. Perfume Y has a higher relative molecular mass than perfume X.

Which row gives
- the name of the process by which the perfume spreads around the room,
- the identity of the perfume that reaches the opposite side of the room in the shorter time?
- A
- B
- C
- D
Correct

Incorrect

Hint

Relate the rate of diffusion of gas to its molecular mass
Question 6 of 6

6. Question
1 point(s)
Under the same conditions, which gas diffuses at the same rate as nitrogen gas?
- carbon dioxide
- carbon monoxide
- neon
- sulfur dioxide
Correct

Incorrect

Hint

Relate the rate of diffusion of gas to its molecular mass

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