The ratio of partial pressure of the vapour in the gas mixture and the saturation vapour pressure of the vapour component is called Relative Humidity Specific Humidity Dry air pressure Humidity Rati

The ratio of the partial pressure of the vapour in the gas mixture and the saturation vapour pressure of the vapour component is called Relative Humidity.

Here's a step-by-step explanation:

1. The partial pressure of a gas is the pressure that the gas would have if it alone occupied the volume of the mixture. In this case, we're talking about the partial pressure of the vapour in a gas mixture.

2. The saturation vapour pressure is the pressure for a corresponding saturation temperature at which a liquid boils into its vapor phase. The saturation vapour pressure of a substance, in this case the vapour component, is the pressure exerted by a vapour in thermodynamic equilibrium with its condensed phases at a given temperature in a closed system.

3. The ratio of these two values, the partial pressure of the vapour and the saturation vapour pressure of the vapour component, is what we call Relative Humidity.

4. Relative Humidity is a measure of how much water vapour is in the air compared to the maximum amount of water vapour that air can hold at a particular temperature. It is expressed as a percentage.

So, in summary, the term you're looking for is Relative Humidity.