JAMB and WAEC Chemistry questions: Kinetic theory of matter and gas laws

45 questions with answers and explanations. Tap an option to check yourself.

1. Question 1· Kinetic theory of matter and gas laws· WAEC

   The change of a gas directly to a solid is called

   • Adeposition
   • Bsublimation
   • Cevaporation
   • Dmelting

   Show answer

   Explanation and discussion

2. Question 2· Kinetic theory of matter and gas laws· JAMB

   Real gases deviate most from ideal behaviour at

   • Alow pressure and high temperature
   • Bhigh pressure and low temperature
   • Croom temperature and pressure
   • Dall conditions equally

   Show answer

   Explanation and discussion

3. Question 3· Kinetic theory of matter and gas laws· WAEC

   A gas occupies 120 cm³ at 1 atm. What volume does it occupy at 3 atm at constant temperature?

   • A360 cm³
   • B40 cm³
   • C120 cm³
   • D20 cm³

   Show answer

   Explanation and discussion

4. Question 4· Kinetic theory of matter and gas laws· JAMB

   

   On the heating curve, the temperature stays constant between D and E because the heat supplied is used to

   • Araise the temperature of the liquid
   • Bchange the liquid into gas
   • Cmelt the solid
   • Dcool the gas

   Show answer

   Explanation and discussion

5. Question 5· Kinetic theory of matter and gas laws· WAEC

   A gas at 2 atm and 300 K is heated at constant volume to 450 K. Its new pressure is

   • A1.33 atm
   • B3 atm
   • C4.5 atm
   • D2 atm

   Show answer

   Explanation and discussion

6. Question 6· Kinetic theory of matter and gas laws· JAMB

   Under the same conditions, which of the following gases diffuses fastest?

   • Aoxygen
   • Bhelium
   • Cmethane
   • Dhydrogen

   Show answer

   Explanation and discussion

7. Question 7· Kinetic theory of matter and gas laws· JAMB

   An assumption of the kinetic theory of an ideal gas is that

   • Athe molecules are at rest
   • Bthere are no forces of attraction between the molecules
   • Cthe molecules occupy most of the container
   • Dcollisions lose energy

   Show answer

   Explanation and discussion

8. Question 8· Kinetic theory of matter and gas laws· JAMB

   Brownian motion provides evidence that

   • Amolecules are stationary in solids
   • Bgases are heavier than liquids
   • Catoms are indivisible
   • Dparticles of matter are in constant random motion

   Show answer

   Explanation and discussion

9. Question 9· Kinetic theory of matter and gas laws· JAMB

   The volume of 0.5 mol of a gas at s.t.p. is: (molar volume = 22.4 dm³)

   • A5.6 dm³
   • B22.4 dm³
   • C44.8 dm³
   • D11.2 dm³

   Show answer

   Explanation and discussion

10. Question 10· Kinetic theory of matter and gas laws· WAEC

    The relative rates of diffusion of hydrogen and oxygen are

    • A2 : 1
    • B1 : 4
    • C16 : 1
    • D4 : 1

    Show answer

    Explanation and discussion

11. Question 11· Kinetic theory of matter and gas laws· JAMB

    500 cm³ of a gas at 1 atm is compressed to 250 cm³ at constant temperature. Find the new pressure.

    • A4 atm
    • B0.5 atm
    • C1 atm
    • D2 atm

    Show answer

    Explanation and discussion

12. Question 12· Kinetic theory of matter and gas laws· JAMB

    A mixture of nitrogen and oxygen has a total pressure of 3 atm. If the partial pressure of nitrogen is 2 atm, find the partial pressure of oxygen.

    • A1 atm
    • B5 atm
    • C1.5 atm
    • D6 atm

    Show answer

    Explanation and discussion

13. Question 13· Kinetic theory of matter and gas laws· WAEC

    At s.t.p., one mole of any gas occupies a volume of

    • A24.0 dm³
    • B22.4 dm³
    • C1.0 dm³
    • D11.2 dm³

    Show answer

    Explanation and discussion

14. Question 14· Kinetic theory of matter and gas laws· WAEC

    The particles of a solid

    • Amove freely in all directions
    • Bvibrate about fixed positions
    • Care far apart
    • Dhave no attraction for one another

    Show answer

    Explanation and discussion

15. Question 15· Kinetic theory of matter and gas laws· WAEC

    Why does the pressure of gas in a sealed tin rise when the tin is heated?

    • AIts molecules become larger
    • BIts molecules move faster and hit the walls harder and more often
    • CThe number of molecules increases
    • DIts molecules attract each other more

    Show answer

    Explanation and discussion

16. Question 16· Kinetic theory of matter and gas laws· WAEC

    Which gas diffuses fastest?

    • Achlorine
    • Boxygen
    • Chydrogen
    • Dcarbon dioxide

    Show answer

    Explanation and discussion

17. Question 17· Kinetic theory of matter and gas laws· JAMB

    A gas occupies 200 cm³ at 0 °C. Find its volume at 273 °C if the pressure stays constant.

    • A100 cm³
    • B400 cm³
    • C273 cm³
    • D546 cm³

    Show answer

    Explanation and discussion

18. Question 18· Kinetic theory of matter and gas laws· WAEC

    Which of the following gases diffuses fastest? (H = 1, He = 4, C = 12, O = 16)

    • AO₂
    • BH₂
    • CCO₂
    • DHe

    Show answer

    Explanation and discussion

19. Question 19· Kinetic theory of matter and gas laws· JAMB

    A mixture of 2 mol of nitrogen and 3 mol of oxygen has a total pressure of 100 kPa. Find the partial pressure of oxygen.

    • A40 kPa
    • B60 kPa
    • C100 kPa
    • D30 kPa

    Show answer

    Explanation and discussion

20. Question 20· Kinetic theory of matter and gas laws· JAMB

    Under the same conditions, which sample has the same volume as 4 g of helium? (He = 4, H = 1)

    • A8 g of hydrogen gas
    • B4 g of hydrogen gas
    • C1 g of hydrogen gas
    • D2 g of hydrogen gas

    Show answer

    Explanation and discussion