Kinetic theory of matter and Gas Laws - Jamb Chemistry Past Questions and Answers

Question 1:

• JAMB 2019

Which of the following statements is NOT correct?

A. The average kinetic energy of a gas is directly proportional to its temperature
B. At constant temperature, the volume of a gas increases as the pressure increases
C. The pressure of a gas is inversely proportional to its volume
D. The temperature of a gas is directly proportional to its volume
E. The collisions of molecules with each other are inelastic

Question 2:

• JAMB 2019

A gas jar was inverted over burning yellow phosphorus floating over water in a beaker. After burning, the water level was found to rise in the gas jar. The water level rises because

A. Pressure inside the gas jar is greater than pressure outside it
B. The air in the gas jar had been used up by burning
C. Oxygen in the gas jar had been used up by burning
D. Nitrogen in the gas jar had been used up by burning
E. The temperature in the jar had risen considerably

Question 3:

• JAMB 1979

\(50cm^{3}\) of hydrogen are sparked with \(20cm^{3}\) of oxygen at \(100°C\) and \(1atm\) . The total volume of the residual gases in

A. 50 cm³
B. 10 cm³
C. 40 cm³
D. 30 cm³
E. 70 cm³

Question 4:

• JAMB 1979

Which of the following statements is true?

A. An increase in the temperature of a given mass of gas increases the number of gas molecules
B. An increase in the temperature of the gas does not affect the kinetic energy
C. An increase in the pressure of the gas is proportional to the increase in volume
D. A increase in the pressure of a gas is proportional to the decrease in volume at constant temperature
E. A decrease in the pressure of the gas decreases the number of gas molecules present

Question 5:

• JAMB 1979

the vapour density of a gas may be defined as

A. The mass of a unit volume of the gas compared to an equal volume of water vapour
B. The mass of a unit volume of the gas compared to an equal volume of hydrogen
C. The mass of a unit volume of the gas compared to an equal volume of oxygen
D. The mass of a unit volume of the gas minus the vapour pressure of water
E. Two times the relative molecular mass of the gas