Gas Laws - Jamb Physics Past Questions and Answers

Question 16:

• JAMB 1989

A mass of gas at 7^oC and 70cm of mercury has a volume of 1200cm³. Determine its volume at 27^oC and pressure of 75cm of mercury.

A. 1200cm³
B. 1378cm³
C. 4320cm³
D. 4629cm³

Question 17:

• JAMB 1990

The pressure of a gas when cooled at constant volume will decrease because the molecules

A. Collide less frequently with the walls of the container
B. Have the same average kinetic energy
C. Break up into smaller molecules
D. Decrease in number

Question 18:

• JAMB 1991

The absolute temperature of a perfect gas is proportional to the average

A. Potential energy of the molecules
B. Seperation between the molecules
C. Kinetic energy of the molecules
D. Velocity of the molecules

Question 19:

• JAMB 1992

At constant pressure, the density of a fixed mass of gas is

A. Constant with temperature
B. Proportional to its volume
C. Inversely proportional to its temperature
D. Independent of its volume

Question 20:

• JAMB 1993

When the volume of a given mass of gas is halved and its temperature doubled, the pressure

A. Remains constant
B. Increases by a factor of 4
C. Increases by a factor of 3
D. Decreases by a factor of 4