Question 1 of 20

Chemistry

1. In which of the following are the particles the most disordered.

Steam at 100°C

Impure water at 102°C

Water at 0°C

Water

Question 1 of 20

Question 2 of 20

2. What volume of gas would one mole of hydrogen occupy at S.T.P?

33.6 dm³

11.2 dm³

44 dm³

22.4 dm³

Question 2 of 20

Question 3 of 20

3. When steam condenses, the particles

Lose energy to their surroundings

Vibrate about fixed positions

Shrink to a smaller size

Move further apart

Question 3 of 20

Question 4 of 20

4. The particles of a gas can be described as

Moving randomly in all directions

Only moving outwards in direction

Vibrating about defined position

Rising upwards

Question 4 of 20

Question 5 of 20

5. Deep sea diver’s tank contains

4% N₂ + 96% O₂

None of these

96% N₂ + 4% O₂

50% N₂ + 50% O₂

Question 5 of 20

Question 6 of 20

6. One heating direct conversion of solid in to gas is called

Sublimation

Evaporation

Boiling

Diffusion

Question 6 of 20

Question 7 of 20

7. Which statement explains why the compounds propane and CO₂ diffuse at the same rate?

Both are denser than air.

Their molecules contain carbon

They are both gases

They have the same relative molecular mass

Question 7 of 20

Question 8 of 20

8. When a large beaker full of N₂ is inverted over a porous pot containing Com the water level in the specified apparatus does not change. What is the reason for this:

Nitrogen is an un-reactive gas.

Both gases are soluble in H₂O

The two gases have equal density

Both gases are diatomic.

Question 8 of 20

Question 9 of 20

9. The number of molecules of 4 g H₂ are _________ number of molecules of 56 g of N₂.

Equal to

Greater than

Less than

None of these

Question 9 of 20

Question 10 of 20

10. According to the kinetic theory of gases, the molecular collisions are elastic. Such collisions cause

High energy change

None of these

A small energy change

No energy change

Question 10 of 20

Question 11 of 20

11. When compressed hydrogen is allowed to expand rapidly, it causes

Liquefaction

Solidification

Heating

Cooling

Question 11 of 20

Question 12 of 20

12. In S.I units, the value of R is

0.0821 dm³ atm K⁻¹ mole⁻¹

8.3143 Nm K⁻¹ mole⁻¹

None of these

8.3413 Nm K⁻¹ mole⁻¹

Question 12 of 20

Question 13 of 20

13. Which gas is more ideal at S.T.P.

H₂

H₂S

SO₂

NH₃

Question 13 of 20

Question 14 of 20

14. 760 torr are equal to Pascal.

One Pascal

101324 Pascal

1.01325 Pascal

760 Pascal

Question 14 of 20

Question 15 of 20

15. According to Graham’s Law of diffusion, the rate of diffusion of H₂ and O₂ has the ratio

4:1

2:32

1:√4

1:4

Question 15 of 20

Question 16 of 20

16. Which statement provides the best evidence that matter may exist as tiny particles moving at “random motion”.

If a bottle of ether is opened, the smell is quickly detected in all parts of the room

A small mass of water produces a much larger volume of steam

Air can be readily compressed

Many elements conduct electricity.

Question 16 of 20

Question 17 of 20

17. According to Kinetic Molecular theory K.E of Molecules increase when they

Are mixed with other molecules at low temperature

Are frozen into solid

Are condensed into solid

Are melted from solid to liquid state

Question 17 of 20

Question 18 of 20

18. Which of the following is an example of diffusion?

Steam condensing on a cold window.

Bubbles rising in a beaker of boiling water.

The spreading of the smell of flowers in a garden.

Water spreading out on the surface of a table.

Question 18 of 20

Question 19 of 20

19. Which of the following gases has the lowest density under room conditions

NH₃

N₂

Question 19 of 20

Question 20 of 20

Abbreviations

20. Which of these changes would speed up the rate of diffusion the most.

No	Mass of Particle	Temperature of Surroundings
A	Decrease	Decrease
B	Decrease	Increase
C	Increase	Increase
D	Increase	Decrease

Question 20 of 20

Test By Subject	Punjab
Test By Topics	11th Class Chemistry

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Punjab 11th Class Chemistry Chapter 3 Gases Mcqs Test Online

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Subject

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Punjab 11th Class Chemistry Chapter 3 Gases Mcqs Test Online

Chemistry Chapter 3 Gases Mcqs Test Online Punjab 9th Class

Chemistry

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