JAMB Chemistry questions

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

1. Question 221· 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

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2. Question 222· 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

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3. Question 223· 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

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4. Question 224· 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

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5. Question 225· 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

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6. Question 226· 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

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7. Question 227· 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

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8. Question 228· 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

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9. Question 229· Kinetic theory of matter and gas laws· JAMB

   What volume does 8 g of oxygen gas occupy at s.t.p.? (O = 16; molar volume = 22.4 dm³)

   • A11.2 dm³
   • B5.6 dm³
   • C22.4 dm³
   • D2.8 dm³

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10. Question 230· Kinetic theory of matter and gas laws· JAMB

    A gas occupies 300 cm³ at 27 °C. At constant pressure, its volume at 127 °C is:

    • A400 cm³
    • B1411 cm³
    • C225 cm³
    • D600 cm³

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11. Question 231· Kinetic theory of matter and gas laws· JAMB

    At constant volume, the pressure of a gas increases when it is heated because its molecules

    • Ahit the walls more often and with greater force
    • Bbecome larger
    • Cattract each other more
    • Dlose energy

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12. Question 232· Kinetic theory of matter and gas laws· JAMB

    Dalton's law of partial pressures states that the total pressure of a gas mixture equals

    • Athe product of the pressures
    • Bthe sum of the partial pressures
    • Cthe average pressure
    • Dthe pressure of the lightest gas

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13. Question 233· Kinetic theory of matter and gas laws· JAMB

    How many moles of gas occupy 24 dm³ at room temperature and pressure? (Molar volume = 24 dm³)

    • A24 mol
    • B1 mol
    • C0.5 mol
    • D2 mol

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14. Question 234· Kinetic theory of matter and gas laws· JAMB

    Ammonia and hydrogen chloride are released at opposite ends of a long tube. A white ring forms nearer the hydrogen chloride end because

    • Ahydrogen chloride is less dense
    • Bhydrogen chloride diffuses faster
    • Cthe ring is ammonia
    • Dammonia diffuses faster, being lighter

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15. Question 235· Kinetic theory of matter and gas laws· JAMB

    Avogadro's law states that equal volumes of all gases at the same temperature and pressure contain

    • Aequal masses
    • Bequal numbers of molecules
    • Cequal numbers of atoms
    • Dequal densities

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16. Question 236· Kinetic theory of matter and gas laws· JAMB

    Brownian motion provides evidence for

    • Athe random motion of particles
    • Bthe existence of electrons
    • Cradioactivity
    • Dnuclear fission

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17. Question 237· Kinetic theory of matter and gas laws· JAMB

    

    The heating curve shows a pure solid heated steadily. The substance is melting between

    • AC and D
    • BA and B
    • CB and C
    • DE and F

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18. Question 238· Kinetic theory of matter and gas laws· JAMB

    Under the same conditions, hydrogen (H₂ = 2) diffuses how many times as fast as oxygen (O₂ = 32)?

    • A16
    • B4
    • C2
    • D8

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19. Question 239· Kinetic theory of matter and gas laws· JAMB

    What volume does 2 g of hydrogen gas occupy at s.t.p.? (H = 1; molar volume = 22.4 dm³)

    • A22.4 dm³
    • B11.2 dm³
    • C44.8 dm³
    • D2 dm³

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20. Question 240· Kinetic theory of matter and gas laws· JAMB

    A gas has a vapour density of 32. Find its relative molecular mass.

    • A64
    • B32
    • C16
    • D128

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