Question

Relative humidity is the ratio of actual vapour pressure to the saturation vapour pressure
1. At the same temperature
2. At the same pressure
3. In the same volume
4. In the same atmosphere

Answer 1

Correct Answer - Option 1 : At the same temperature

Relative Humidity is inversely related to temperature of the surrounding environment. Higher the temperature, lower will be the relative humidity. Therefore, it is defined as ratio of actual vapour pressure to the saturation vapour pressure at given temperature.

Note: Saturated vapour is the pressure exerted by water vapours present in air, when air becomes fully saturated with water.

Important Points:

1. Humidity is a measure of the amount of water vapour persent in the air.

2. Absolute humidity is how much water vapour is present in the air of given volume.

3. Relative humidity is a measure of how much water vapour is in the air when compared to how much the air could absorb.