JAMB Physics · Energy, pressure and heat
Vapours: JAMB Physics Past Questions and Answers
What the JAMB syllabus covers in Vapours
Our summary: Saturated and unsaturated vapours, dew point, humidity and how the weather forms dew, fog and rain.
- Unsaturated and saturated vapours
- Relationship between saturated vapour pressure (S.V.P) and boiling
- Determination of S.V.P by barometer tube method
- Formation of dew, mist, fog, cloud and rain
- Study of dew point, humidity and relative humidity
- Hygrometry; estimation of the humidity of the atmosphere using wet and dry bulb hygrometers
Objectives
- distinguish between saturated and unsaturated vapours;
- relate saturated vapour pressure to boiling point;
- determine S.V.P by barometer tube method;
- differentiate between dew point, humidity and relative humidity;
- estimate the humidity of the atmosphere using wet and dry bulb hygrometers;
- solve numerical problems.
Syllabus content © The Joint Admissions and Matriculation Board (UTME).
JAMB Physics questions on Vapours
- JAMB 2025A collection of condensed suspended dust particles in the air constitute
- JAMB 2024If the rate of evaporation is y, and the rate of condensation is x, then, a vapour is saturated when
- JAMB 2024If the S.V.P of water vapour was 13.5mmHg at 33ºC and 7.3mmHg at 7ºC. Find the percentage relative of the air on a day when average air temperature was 33ºC and…
- JAMB 2023On a particular hot day, the temperature is 40°C and the partial pressure of water vapor in the air is 38.8 mmHg. What is the relative humidity?
- JAMB 2022The vapour pressure?
- JAMB 2021I. A liquid boils when its saturated vapor pressure is equal to the external pressure II. Dissolved substances in pure water lead to an increase in the boiling…
- JAMB 2021Which of the following instruments may be used to measure relative humidity?
- JAMB 2019The 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…
- JAMB 2017Which of the following instruments helps to maintain the correct humidity and temperature of a building?
- JAMB 2016Boiling occurs when the vapour pressure of a liquid is
- JAMB 2016A saturated vapour pressure of a liquid increases when the
- JAMB 2016Vapour is said to be saturated on top of an enclosed liquid if …
- JAMB 2016What happens to a water pool on a day when the humidity of the air is very low?
- JAMB 2015Volatile liquids usually
- JAMB 2014The small droplets of water that form on the grass in the early hours of the morning is
- JAMB 2014The temperature at which the water vapour present in the air is just sufficient to saturate air is
- JAMB 2013What will happen to the boiling point of pure water when it is heated in a place 30m below sea level?
- JAMB 2012Which of the following is NOT a factor that can increase the rate of evaporation of water in a lake?
- JAMB 2010The small droplet of water that forms on the grass in the early hours of the morning is
- JAMB 2010A vapor is said to be saturated when?
Years with Vapours questions in DeeepSolve's question bank
From the past questions DeeepSolve holds, not a count of everything the exam body has set.
- 2025
- 2024
- 2023
- 2022
- 2021
- 2019
- 2017
- 2016
- 2015
- 2014
- 2013
- 2012
- 2010