Unsaturated and saturated vapours - Jamb Physics Past Questions and Answers

Question 1:

• JAMB 2019

If the time of flight is 96seconds, calculate the horizontal range through the point of projection.

A. 84400m
B. 69000m
C. 61440m
D. 24000m

Question 2:

• JAMB 1981

A vapour is said to be saturated when

A. Moer molecules return to the liquid than leave it
B. A dynamic equilibrium exists between the liquid molecules and the vapour molecules at a given temperature
C. The vapour pressure is atmospheric
D. The temperature of the vapour varies
E. All molecules are moving with the same speed

Question 3:

• JAMB 1985

Which of the following statements are NOT correct?

A. Boiling occurs when the saturated vapour pressure of the liquid involved equals the external pressure
B. Both the boiling point and the saturated vapour pressure of a given liquid depends on the external pressure
C. The saturated vapour presssure rises with increase in temperature
D. The saturated vapour pressure is independent of the volume available for the vapour
E. It is possible to boil water at a lower temperature than 100^oC at high altitude

Question 4:

• JAMB 1991

The saturated vapour pressure of a liquid increases as the

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

Question 5:

• JAMB 1994

If a room is saturated with water vapour, the temperature of the room must be

A. At 0^oC
B. Above the dew point
C. At 100^oC
D. Below or at the dew point