A. purity of milk
B. relative humidity
C. specific gravity of liquid
D. None of the above
✅ The correct answer is option B.
Hygrometer is used to measure relative humidity. Humidity is the measure of the amount of moisture in the air. A psychrometer is an example of a hygrometer.
Hygrometer is used to measure relative humidity. Humidity is the measure of the amount of moisture in the air. A psychrometer is an example of a hygrometer.