Physics Practice Test – Kinetic Theory of Matter and the Gas Laws (Questions with Answers and Explanations)

Normal atmospheric pressure at a sea-level is 10⁵ Nm^-2 and the acceleration due to gravity is approximately 10 ms^-1. If the atmosphere has a uniform density of 1kgm^-3 its height is __________ (JAMB 1984) 

A. 100m
B. 1000m
C. 10,000m
D. 100,000m

An air column 10 cm in length is trapped into the sealed end of a capillary tube by a 15 cm column of mercury with the tube held vertically as shown ¡n the Fig. above. On inverting the tube, the air column becomes 15 cm long. The atmospheric pressure during the experiment is ______ (JAMB 1979)

A. 90 cm
B. 76 cm
C. 75 cm
D. 60 cm

The pressure of a gas when cooled at constant volume will decrease because the molecules _________ (JAMB 1990)

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.

A column of air 10.0 cm long is trapped in a tube at 27°C. What is the length of the column at 100°C? (JAMB 1989)

A. 12.4 cm
B. 13.7 cm
C. 18.5 cm
D. 37.0 cm

The instrument used to measure the atmospheric pressure is known as _______

A. barometer
B. manometer
C. speedometer
D. nanometer