When the relative humidity is 50% and air temperature is 30°C, a cooling of air mass ________

A. Raises the absolute humidity

B. Produces no change in relative humidity

C. Decreases the relative humidity

D. Increases the relative humidity

Answer: Option C

Solution(By Examveda Team)

When the relative humidity is 50% and air temperature is 30°C, a cooling of air mass decreases the relative humidity. Relative humidity (RH) is the percentage of the maximum amount of water vapour the air at the current temperature can hold before saturation.