Q- Consider the following statements with regard
to atmospheric humidity :
1. Absolute humidity is the amount of water vapour per unit volume.
2. Hygrometer is used to measure relative humidity.
3. Dew point is the temperature at which the relative humidity is 75%
Which of the above statements are correct?

Answer – 1,2 only

EXPLANATION

l. Absolute humidity is the measure of water vapor (moisture) in the air, regardless of temperature. It is expressed as grams of moisture per cubic meter of air (g/m3).
Hygrometer is an instrument that measures relative humidity.
The dew point is the temperature at which a given sample of air will have a relative humidity
of 100 percent.