Vapours - Jamb Physics Past Questions and Answers

Question 21:

• JAMB 2017

Which of the following instruments helps to maintain the correct humidity and temperature of a building?

A. A compressor
B. A refrigerator
C. Air blower
D. Air conditioner

Question 22:

• JAMB 2018

The process whereby a liquid turns spontaneously into vapour is called

A. Regelation
B. Evaporation
C. Boiling
D. Sublimation

Question 23:

• JAMB 2019

The mass of water vapour in a given volume of air is 0.05g at 20°C, while the mass of water vapour required to saturate it at the same temperature is 0.15g. Calculate the relative humidity of the air.

A. 3.33%
B. 5.55%
C. 33.33%
D. 55.55%

Question 24:

• JAMB 2021

Which of the following instruments may be used to measure relative humidity?

A. Hydrometer
B. Manometer
C. Hygrometer
D. Hypsometer