Which one of the following is not a form of condensation?
- A.Dew
- B.Fog
- C.Frost
- D.Sleet
Correct answer
Explanation
The correct answer is D, Sleet. Sleet is a form of precipitation, frozen raindrops or a mix of rain and snow that falls from clouds, not a form of condensation.
Condensation is the change of water vapour into liquid water or ice when air cools to its dew point. It happens around tiny particles such as dust, smoke and salt, called hygroscopic nuclei. Its forms depend on the temperature and on where the cooling happens: dew forms as droplets on cool surfaces like grass; frost forms when the dew point is below freezing and the vapour turns straight into ice crystals; fog is a cloud of droplets in the air near the ground; and clouds form higher up. Precipitation is the next stage, when the drops grow heavy and fall as rain, snow, sleet or hail.
A is wrong because dew is condensation on cold surfaces near the ground. B is wrong because fog is condensation in the air close to the surface. C is wrong because frost is condensation below the freezing point.
Exam tip: Dew, frost, fog and clouds are condensation; rain, snow, sleet and hail are precipitation.
Practice Questions
View allBagram Air Base is located in
- A.Turkey
- B.Pakistan
- C.Afghanistan
- D.Israel
Show answer
Bagram Air Base lies in Parwan province of Afghanistan, about 60 km north of the capital Kabul.
Read the full explanation →Which one of the following statements is not correct?
- A.Position of the Sun, Earth and Moon in a straight line of 180° angle is known as syzygy.
- B.Syzygy conjunction causes solar eclipse.
- C.Syzygy opposition causes lunar eclipse.
- D.Syzygy conjunction occurs at the time of perihelion only.
Show answer
This statement is not correct, because conjunction happens at every new moon, about once a month, and has nothing to do with the Earth's closest point to the Sun.
Read the full explanation →Which one of the following about sugar industry of Peninsular India is not correct?
- A.High yield per hectare of sugarcane
- B.Higher sucrose content
- C.Long crushing season
- D.Most of the mills in the Peninsula are located mainly along the east coast
Show answer
This statement is not correct, because the peninsular sugar mills are concentrated mainly in Maharashtra and Karnataka, in the west and the interior of the plateau.
Read the full explanation →Which of the following statements is/are correct?
1. Visakhapatnam Port is a land-locked harbour.
2. Deendayal Port is a tidal port.
Select the correct answer using the code given below.
- A.1 only
- B.2 only
- C.Both 1 and 2
- D.Neither 1 nor 2
Show answer
Both statements describe the two ports correctly. Visakhapatnam in Andhra Pradesh is India's deepest land-locked and protected port on the east coast.
Read the full explanation →Weathering, mass wasting, erosion and transportation are indicators of which one of the following processes?
- A.Denudation
- B.Endogenetic process
- C.Diastrophism
- D.Mountain building
Show answer
Weathering, mass wasting, erosion and transportation together wear down and strip away the earth's surface, and this combined work is called denudation.
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