Q1. Humidity of the air
(a) Increases with the increase in atmospheric temperature
(b) Decreases with the increase in atmospheric temperature
(c) Is not affected by the change in atmospheric temperature
(d) Does not show any consistent behaviour with the change in atmospheric temperature
(UPSC Prelims 1981)
Answer: (a) Increases with the increase in atmospheric temperature
Explanation: As temperature rises, air can hold more water vapour, increasing humidity. This is why warm climates often feel more humid, while cold air holds less moisture.
Q2. Hygrometer is used to measure
(a) Density of a liquid
(b) Relative humidity of atmosphere
(c) Absorption power of plants
(d) Temperature of air
Answer: (b)
Explanation: A hygrometer measures the relative humidity in the atmosphere, which is the amount of moisture present in the air. It is essential in weather forecasting, agriculture, and climate studies.