Waec Physics Past Questions For Year 1996
Question 21
Water boils at a lower temperature when heated at the top of a mountain than at sea-level because at the top of the mountain the
- A. saturation vapour pressure of water is higher than at sea-level
- B. sun adds more heat to the water
- C. temperature is lower than at sea- level
- D. relative humidity of the atmosphere is lower
- E. pressure of the atmosphere is lower
Question 22
Cloud formation is the direct result of
- A. precipitation
- B. vaporization
- C. fusion
- D. sublimation
- E. condensation
Question 23
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
- E. mass of the liquid decreases
Question 24
The inside of a vacuum flask is usually coated with silver to reduce heat lost by
- A. convection
- B. conduction
- C. radiation
- D. absorption
- E. evaporation
Question 25
When a ray of light is incident normally on an air- glass interface, its angle of refraction is
- A. 0o
- B. 42o
- C. 45o
- D. 60o
- E. 90o.
