Cooling the air without changing the water vapour content will ?

C. Increase the relative humidity

A. Have no effect on relative humidity

B. Decrease the relative humidity

C. Increase the relative humidity

D. First increase then decrease the relative humidity

Everyday Science · Environment, Weather & Ecology · page 2 of 10

Weather & Meteorological MCQs with Answers

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Weather & Meteorological Phenomena MCQs (11–20)

10 MCQs with answers and a short one-liner. Hide answers to test yourself.

Past paper MCQs in this chapter · See all past papers

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11.
Past Paper MCQ
The cause of soil pollution is _?
Correct Answer: D. Acid rain
One-liner
The cause of soil pollution is acid rain, which introduces harmful chemicals into the soil.
12.
Past Paper MCQ
Sulphur and Nitrogen cause _?
Correct Answer: C. Acid rain
One-liner
Sulphur and nitrogen oxides react with water vapour in the atmosphere to form acid rain.
13.
Past Paper MCQ
Marble cancer to the Taj Mahal is caused by?
Correct Answer: D. Acid rain
One-liner
Marble cancer of the Taj Mahal is caused by acid rain, which corrodes marble due to the reaction of sulfuric and nitric acids with calcium carbonate.
14.
Past Paper MCQ
The purest form of water is obtained from _?
Correct Answer: A. Rain water
One-liner
The purest form of water is obtained from rain water.
15.
Which of the following is an outcome of condensation?
Correct Answer: C. Dew
One-liner
Condensation results in the formation of dew when water vapor in the air cools and turns into liquid droplets on surfaces.
16.
Cooling the air without changing the water vapour content will ?
Correct Answer: C. Increase the relative humidity
One-liner
Cooling the air without changing the water vapour content will increase the relative humidity because cooler air has a lower capacity to hold moisture.
17.
Smog is produced by using which of the energy sources?
Correct Answer: C. Fossil fuels
One-liner
Smog is produced by using fossil fuels as an energy source.
18.
Wind vane is used to detect the of the wind.
Correct Answer: B. Direction
One-liner
A wind vane (also called a weather vane) is used to detect the direction of the wind.
19.
Clear nights are cooler than cloudy nights because of ?
Correct Answer: C. Radiation
One-liner
Clear nights are cooler than cloudy nights because of radiation — clouds act as a blanket, trapping Earth's outgoing longwave radiation.
20.
The pH of acid rain is less than ?
Correct Answer: B. 5.6
One-liner
The pH of acid rain is less than 5.6.

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Weather & Meteorological MCQs with Answers

Weather & Meteorological Phenomena MCQs (11–20)

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