Vapours - Jamb Physics Past Questions and Answers

Question 16:

• JAMB 2012

Dry
Day 1 - 30°C | Day 2 - 29°C | Day 3 - 25°C
Wet
Day 1 - 22°C | Day 2 - 22°C | Day 3 - 21°C
The reading above are for three consecutive days from a wet and dry bulb hygrometer. It can be concluded that the relative humidity for the three days

A. Decreased steadily
B. Remained unchanged
C. Increased steadily
D. Was least on Day 1

Question 17:

• JAMB 2014

The temperature at which the water vapour present in the air is just sufficient to saturate air is

A. Boiling point
B. Ice point
C. Saturation point
D. Dew point

Question 18:

• JAMB 2016

What happens to a water pool on a day when the humidity of the air is very low?

A. Temperature decreases
B. Slow evaporation
C. Temperature increases
D. Rapid evaporation

Question 19:

• JAMB 2016

A saturated vapour pressure of a liquid increases when the

A. Temperature of a liquid increases
B. Volume of the liquid increases
C. Volume of the liquid decreases
D. Temperature of the liquid decreases

Question 20:

• JAMB 2016

Vapour is said to be saturated on top of an enclosed liquid if _________

A. The rate of condensation is greater than that of vapourization
B. The rate of condensation is equal to that of vapourization
C. There is neither condensation nor vaporization of the liquid
D. The rate of condensation is less that that of vaporization