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UPSC Geography Page: 6
3808.The atmospheric temperature significantly varies in its distribution pattern. The factors that are the reason for this variability include
1) Sign of latitude.
2) Land and water distribution.
3) Oceanic currents.
Choose the correct reason from the following codes.
1, 2 only.
2, 3 only.
1, 3 only.
All the above.
Explanation:
Apart from the three mentioned, the variability is also the effect of prevailing winds, cloudcover and altitude.
3809.Consider the statements regarding salinization which is a one of the major problem, reducing Indian agricultural productivity.
1. In drier regions, capillary action can lead to salt accumulation on the surface of the land which is brought from the deep saline ground water tables.
2. Irrigation can result in salinization of soils.
3. It can occur both naturally as well as artificially.
Choose the correct statements from the codes given below.
1, 2 only.
1, 3 only.
2, 3only.
All the above.
Explanation:
In drier regions wherever salt accumulation has occurred because of capillary action, thesalts are brought from the shallow depth where the saline ground water table exists.Salination can be caused by natural processes such as mineral weathering or by the gradualwithdrawal of an ocean. It can also come about though artificial processes such as irrigation.Salinity from irrigation can occur over time wherever irrigation is used; since almost allwater (even natural rainfall) contains some dissolved salts. When the plants use the water,the salts are left behind in the soil and eventually begin to accumulate.
3810.The Arabian Sea branch of the monsoon is much more powerful than the Bay of Bengal branch because
Arabian sea is larger than the Bay of Bengal.
entire Arabian sea current advances towards India, whereas only a part of the Bay of Bengal current enters India.
both a. and b.
none is correct because Bay of Bengal branch is more powerful.
Explanation:
The question has been formed from the geography book by Khullar. The Arabian Sea branch of the monsoon is much more powerful than the Bay of Bengal branch because – 1. Arabian sea is larger than the Bay of Bengal and 2. entire Arabian sea current advances towards India, whereas only a part of the Bay of Bengal current enters India.
3811.Paleomagnetism is the past magnetism of Earth stored in a rock.
Which among the following type of rocks provides most reliable readings of magnetism at a particular time?
Igneous rocks.
Sedimentary rocks.
Metamorphic rocks.
All the above rock types are equally reliable.
Explanation:
Increasing reliability of the rocks: igneous > sedimentary > metamorphic.
3812.Troposphere being the weather layer is the most important layer.
Consider the statements regarding this weather layer.
1) The height of the troposphere increases from Equator to the Poles.
2) The height of the troposphere is comparatively more during the summer season than in the winter season.
3) The height of the troposphere doesn’t get affected by the change in seasons.
Choose the correct statement/s from the following code.
2 only.
1, 3 only.
2, 3 only.
3 only.
Explanation:
Because of the strong convection in the Equatorial region, the tropopause is pushed upwardthere by increasing the height of troposphere in the Equators while it is not the case in thePoles.During summer season, the air gets heated up and creates low pressure on the ground thusincreasing the pressure gradient which propels the air movements upwards and in turnpushing the tropopause upwards.
3813.Himalayan yew is a plant found in Himachal Pradesh and Arunachal Pradesh was in news recently.
Consider the following statements regarding the plant.
1) It is a medicinal plant.
2) A chemical compound called ‘Taxol ‘obtained from the plant is used as an effective anti-TB drug.
Choose the incorrect statements from code below.
1 only.
2 only.
Both are true.
None of the above.
Explanation:
A chemical compound called ‘ taxol ‘ obtained from the plant is used as an effective anticancerdrug.
3814.Earth experiences seasons in a rhythmic fashion.
What are the causative factors?
1) Rotation of the Earth on its own axis.
2) Revolution of the Earth in its orbit around the Sun.
3) Spherical shape of the Earth.
4) Earth’s tilted axis.
5) Axial parallelism.
Choose the correct code from the following.
1, 2 only.
1, 2, 3 only.
1, 2, 4, 5 only.
All the above.
Explanation:
Axial parallelism is the unchanging orientation of the Earth’s axis. Earth’s North Pole iscurrently pointing to the Polar star.All the above reasons combine and result a into season formation.
3815.Some parts of India has littoral and swamp forests. With reference to these forests ,consider the following statements :
1. they can survive in both fresh as well as brackish water
2. important species of such forests are teak, sal, mahua etc
Which of the statements given above is/are correct ?
1 only
2 only
Both 1 and 2
Neither 1 nor 2
Explanation:
Statement 1 – they can survive in both fresh as well as brackish water is a peculiar feature of littoral forests. Teak, sal and mahua are well know species of tropical moist deciduous forests. Some examples of littoral species are – sundari, agar, bhendi and keora.
3816.The greatest damage to life and property from a hurricane is due to
storm surge.
torrential rains.
strong winds in the hurricane
both b. and c.
Explanation:
While both strong winds and torrential rains cause damage, the greatest damage is due to the storm surge. Storm surge is an abnormal rise of water generated by a storm, over and above the predicted astronomical tides.
3817.Which of the following areas is/are best suited for formation of air masses?
1. an extensive area with broadly uniform surface of earth.
2. areas having cyclones.
3. hot deserts in tropical regions.
Select the correct answer using the codes given below.
1 and 2 only
1 and 3 only
1 only
1, 2 and 3 only
Explanation:
Areas having cyclones have converging air flow and are therefore not suited for formation of air masses. Air masses are formed over an extensive area with broadly uniform surface of earth like hot desert region in tropical areas. Anticyclone over an area also helps in formation of air masses as they have divergent air flow.
3818.Which one of the following is correct descending order (% composition) of permanent gases of Atmosphere?
Argon > Carbon dioxide > Neon > Helium
Carbon dioxide > Argon > Neon > Helium
Carbon dioxide > Argon > Helium > Neon
Argon > Carbon dioxide > Helium > Neon
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