World and Physical Geography Archives

61. Consider the following statements: Statement-I : Sumed pipeline is a s

Consider the following statements:
Statement-I :
Sumed pipeline is a strategic route for Persian Gulf oil and natural gas shipments to Europe.
Statement-II :
Sumed pipeline connects the Red Sea with the Mediterranean Sea.
Which one of the following is correct in respect of the above statements ?

[amp_mcq option1=”Both Statement-I and Statement-II are correct and Statement-II explains Statement-I” option2=”Both Statement-I and Statement-II are correct, but Statement-II does not explain Statement-I” option3=”Statement-I is correct, but Statement-II is incorrect” option4=”Statement-I is incorrect, but Statement-II is correct” correct=”option1″]

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The correct option is A, as both Statement-I and Statement-II are correct, and Statement-II explains Statement-I.

Statement-I correctly identifies the Sumed pipeline as a strategic route for oil and natural gas shipments from the Persian Gulf to Europe. Statement-II correctly describes the Sumed pipeline’s function, stating that it connects the Red Sea with the Mediterranean Sea. This geographical connection is precisely what makes it a strategic route for Persian Gulf energy exports to Europe, as it bypasses the need for tankers to navigate around the southern tip of Africa (Cape of Good Hope) or allows supertankers too large for the Suez Canal to transfer oil.

The Sumed pipeline (Suez-Mediterranean Pipeline) runs from Ain Sokhna on the Red Sea to Sidi Kerir on the Mediterranean Sea coast of Egypt. It serves as a vital alternative and supplementary route for transporting oil, particularly for very large crude carriers (VLCCs) that cannot fully traverse the Suez Canal. The oil is offloaded at the Red Sea terminal, transported via pipeline, and reloaded onto tankers at the Mediterranean terminal for onward shipment to Europe and North America.

62. Consider the following information : Region Name of the mount

Consider the following information :

Region	Name of the mountain range	Type of mountain
1. Central Asia	Vosges	Fold mountain
2. Europe	Alps	Block mountain
3. North America	Appalachians	Fold mountain
4. South America	Andes	Fold mountain

In how many of the above rows is the given information correctly matched ?

[amp_mcq option1=”Only one” option2=”Only two” option3=”Only three” option4=”All four” correct=”option2″]

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Let’s examine each row:
1. Central Asia, Vosges, Fold mountain: The Vosges Mountains are located in Western Europe (France/Germany), not Central Asia. They are primarily block mountains formed by faulting, not fold mountains, although they have experienced complex geological history. This row is incorrectly matched.
2. Europe, Alps, Block mountain: The Alps are located in Europe. They are classic examples of young fold mountains formed by the collision of the African and Eurasian tectonic plates. They are not block mountains. This row is incorrectly matched.
3. North America, Appalachians, Fold mountain: The Appalachian Mountains are located in eastern North America. They are ancient fold mountains formed by past continental collisions. This row is correctly matched.
4. South America, Andes, Fold mountain: The Andes Mountains are located along the western coast of South America. They are young fold mountains formed by the subduction of the Nazca Plate under the South American Plate. This row is correctly matched.
Therefore, two rows (3 and 4) are correctly matched.

– Fold mountains are formed by compressional forces leading to folding of crustal rocks (e.g., Himalayas, Alps, Andes, Rockies, Appalachians).
– Block mountains are formed by faulting and uplifting or down-dropping of blocks of crust (e.g., Vosges, Black Forest, Sierra Nevada).

Mountain types are determined by the geological processes that formed them. Fold mountains are associated with convergent plate boundaries, while block mountains are associated with faulting, often in areas of tension or rifting.

63. Consider the following countries : 1. Finland 2. Germany 3. Norway 4.

Consider the following countries :
1. Finland
2. Germany
3. Norway
4. Russia
How many of the above countries have a border with the North Sea ?

[amp_mcq option1=”Only one” option2=”Only two” option3=”Only three” option4=”All four” correct=”option2″]

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UPSC IAS – 2024

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The countries that border the North Sea are the United Kingdom, Norway, Denmark, Germany, the Netherlands, Belgium, and France. From the given list:
1. Finland borders the Baltic Sea, not the North Sea.
2. Germany borders the North Sea.
3. Norway borders the North Sea.
4. Russia has extensive coastlines on various seas (Baltic, Arctic, Pacific, Black, Caspian), but not the North Sea.
Therefore, only Germany and Norway from the list border the North Sea. This is a count of two countries.

– The North Sea is a marginal sea of the Atlantic Ocean.
– Key bordering countries are UK, Norway, Denmark, Germany, Netherlands, Belgium, France.

Understanding the geography of Europe, particularly the bordering seas of different countries, is important for geographical questions. Finland is primarily associated with the Baltic Sea, and Russia’s European coastlines are on the Baltic, Barents, White, and Black Seas.

64. Consider the following statements : Statement-I : Rainfall is one of

Consider the following statements :

Statement-I : Rainfall is one of the reasons for weathering of rocks.
Statement-II : Rain water contains carbon dioxide in solution.
Statement-III : Rain water contains atmospheric oxygen.

Which one of the following is correct in respect of the above statements?

[amp_mcq option1=”Both Statement-II and Statement-III are correct and both of them explain Statement-I” option2=”Both Statement-II and Statement-III are correct, but only one of them explains Statement-I” option3=”Only one of the Statements II and III is correct and that explains Statement-I” option4=”Neither Statement-II nor Statement-III is correct” correct=”option1″]

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Statement-I is correct. Rainfall is a major agent of weathering. This includes physical weathering (e.g., the impact of raindrops, wetting and drying cycles) and chemical weathering. Statement-II is correct. Rainwater absorbs carbon dioxide from the atmosphere, forming weak carbonic acid (H₂CO₃) in solution. Statement-III is correct. Rainwater also absorbs oxygen from the atmosphere. Both carbon dioxide (as carbonic acid) and oxygen dissolved in rainwater contribute significantly to chemical weathering processes. Carbonic acid reacts with minerals like calcium carbonate (carbonation), and dissolved oxygen causes oxidation of iron-bearing minerals (oxidation). Therefore, both Statement-II and Statement-III describe components of rainwater that are responsible for chemical weathering, which is a type of weathering caused by rainfall. Thus, both statements are correct and both explain Statement-I by describing mechanisms through which rainfall causes weathering.

– Rainfall causes both physical and chemical weathering.
– Chemical weathering involves reactions between rock minerals and substances in rainwater.
– Carbon dioxide in rainwater forms carbonic acid, causing carbonation.
– Oxygen in rainwater causes oxidation.

Chemical weathering is particularly effective in warm and humid climates where rainfall is abundant. The presence of dissolved substances like CO2 and O2 in rainwater significantly enhances its chemical reactivity with rocks.

65. Which of the following countries are well known as the two largest coc

Which of the following countries are well known as the two largest cocoa producers in the world ?

[amp_mcq option1=”Algeria and Morocco” option2=”Botswana and Namibia” option3=”Côte d’Ivoire and Ghana” option4=”Madagascar and Mozambique” correct=”option3″]

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Côte d’Ivoire (Ivory Coast) and Ghana are consistently the two largest cocoa-producing countries in the world, accounting for a significant majority of global cocoa bean production. They are both located in West Africa, which is the dominant region for cocoa cultivation.

Côte d’Ivoire is the largest producer, followed by Ghana. West Africa produces about two-thirds of the world’s cocoa.

Cocoa is the primary ingredient in chocolate. The economies of Côte d’Ivoire and Ghana are heavily reliant on cocoa exports.

66. Which of the following is/are correct inference/inferences from isothe

Which of the following is/are correct inference/inferences from isothermal maps in the month of January ?

The isotherms deviate to the north over the ocean and to the south over the continent.
The presence of cold ocean currents, Gulf Stream and North Atlantic Drift make the North Atlantic Ocean colder and the isotherms bend towards the north.

Select the answer using the code given below :

[amp_mcq option1=”1 only” option2=”2 only” option3=”Both 1 and 2″ option4=”Neither 1 nor 2″ correct=”option1″]

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In the Northern Hemisphere winter (January), land surfaces cool down much faster and to lower temperatures than ocean surfaces at similar latitudes.
Statement 1 is correct. Over continents, the cold air causes isotherms to bend southwards (equatorwards). Over oceans, the relatively warmer water causes isotherms to bend northwards (polewards). This describes the typical pattern observed on isothermal maps in January over the Northern Hemisphere.
Statement 2 is incorrect. The Gulf Stream and North Atlantic Drift are warm ocean currents that transport warm water to higher latitudes in the North Atlantic. This makes the North Atlantic Ocean significantly *warmer* than surrounding land masses or areas influenced by cold currents. This warmth causes the isotherms to bend *north* over the North Atlantic, indicating higher temperatures extending polewards. The statement incorrectly claims these currents make the ocean colder.
Therefore, only Statement 1 is a correct inference.

Isotherms reflect temperature distribution. In winter, continents are typically colder than oceans at the same latitude due to differences in specific heat capacity and heat transfer mechanisms. Warm ocean currents cause isotherms to bend poleward.

The bending of isotherms over land and sea in winter is a clear manifestation of the differential heating and cooling properties of land and water and the influence of ocean currents.

67. Consider the following: Pyroclastic debris Ash and dust Nitrogen c

Consider the following:

Pyroclastic debris
Ash and dust
Nitrogen compounds
Sulphur compounds

How many of the above are products of volcanic eruptions ?

[amp_mcq option1=”Only one” option2=”Only two” option3=”Only three” option4=”All four” correct=”option4″]

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All four listed items are products of volcanic eruptions. Volcanic eruptions release a variety of materials into the atmosphere and onto the Earth’s surface.
1. Pyroclastic debris: This refers to fragmented solid material ejected during an eruption, ranging from fine ash and dust to larger bombs and blocks.
2. Ash and dust: These are fine particles of pulverized rock and glass ejected from the volcano. They can travel long distances and pose significant hazards.
3. Nitrogen compounds: Volcanic gases typically contain significant amounts of nitrogen (often as N2), along with smaller amounts of nitrogen compounds like ammonia (NH3). So, nitrogen compounds are among the gaseous products.
4. Sulphur compounds: Sulphur dioxide (SO2) and hydrogen sulphide (H2S) are common and often abundant volcanic gases. These compounds can have significant environmental impacts, including contributing to acid rain and atmospheric aerosols.
Therefore, all four are products of volcanic eruptions.

Volcanic products include solid ejecta (lava, pyroclastics) and gases. Common volcanic gases include water vapor, carbon dioxide, sulfur compounds, nitrogen compounds, hydrogen, carbon monoxide, and halogens.

The composition and quantity of volcanic products vary greatly depending on the type of volcano and the nature of the eruption. Volcanic ash plumes can disrupt air travel and affect climate.

68. Consider the following statements : Statement-I : Thickness of the t

Consider the following statements :

Statement-I :
Thickness of the troposphere at the equator is much greater as compared to poles.
Statement-II :
At the equator, heat is transported to great heights by strong convectional currents.

Which one of the following is correct in respect of the above statements ?

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Statement-I is correct. The thickness of the troposphere varies with latitude and season, being greatest at the equator (around 16-18 km) and thinnest at the poles (around 8-10 km).
Statement-II is correct. At the equator, high solar insolation leads to intense heating of the surface and lower atmosphere, resulting in strong convectional currents. These rising air currents transport heat and moisture upwards to great heights, pushing the boundary of the troposphere (tropopause) higher. At the poles, there is less heating and weaker convection, resulting in a lower tropopause.
Statement-II provides the physical mechanism (strong convection due to heat transport) that explains why the troposphere is thicker at the equator compared to the poles. Therefore, both statements are correct, and Statement-II explains Statement-I.

The thickness of the troposphere is primarily controlled by temperature and convection. Warmer temperatures and stronger convection lead to a higher tropopause.

The troposphere is the lowest layer of Earth’s atmosphere where most weather occurs. The tropopause is the boundary between the troposphere and the stratosphere.

69. On June 21 every year, which of the following latitude(s) experience(s

On June 21 every year, which of the following latitude(s) experience(s) a sunlight of more than 12 hours ?

Equator
Tropic of Cancer
Tropic of Capricorn
Arctic Circle

Select the correct answer using the code given below :

[amp_mcq option1=”1 only” option2=”2 only” option3=”3 and 4″ option4=”2 and 4″ correct=”option4″]

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June 21st marks the Summer Solstice in the Northern Hemisphere. On this day, the Earth’s Northern Hemisphere is maximally tilted towards the sun.
– Equator (0° latitude): Experiences roughly 12 hours of daylight and 12 hours of night throughout the year, including on June 21st. Sunlight duration is approximately 12 hours, not more than 12 hours.
– Tropic of Cancer (approx 23.5° N): On June 21st, the sun is directly overhead at noon at the Tropic of Cancer. All locations in the Northern Hemisphere north of the equator experience more than 12 hours of daylight on this day. The closer to the North Pole, the longer the daylight. So, the Tropic of Cancer experiences more than 12 hours.
– Tropic of Capricorn (approx 23.5° S): June 21st is the Winter Solstice in the Southern Hemisphere. Locations south of the equator experience less than 12 hours of daylight on this day (except south of the Antarctic Circle, which has 24 hours of darkness). So, the Tropic of Capricorn experiences less than 12 hours.
– Arctic Circle (approx 66.5° N): On June 21st, all locations north of the Arctic Circle experience 24 hours of daylight (Midnight Sun). 24 hours is definitely more than 12 hours.
Therefore, the Tropic of Cancer and the Arctic Circle experience sunlight of more than 12 hours on June 21st.

On the Northern Hemisphere Summer Solstice (June 21st), all latitudes in the Northern Hemisphere north of the equator experience more than 12 hours of daylight; the duration increases with latitude.

The phenomenon of polar day (24 hours of sunlight) occurs north of the Arctic Circle on June 21st. The duration of daylight increases from 12 hours at the equator to 24 hours at or north of the Arctic Circle on this day.

70. With reference to “Coriolis force”, which of the following statements

With reference to “Coriolis force”, which of the following statements is/are correct?

It increases with increase in wind velocity.
It is maximum at the poles and is absent at the equator.

Select the answer using the code given below :

[amp_mcq option1=”1 only” option2=”2 only” option3=”Both 1 and 2″ option4=”Neither 1 nor 2″ correct=”option3″]

This question was previously asked in

UPSC IAS – 2024

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The Coriolis force is an apparent force caused by the Earth’s rotation that deflects moving objects (like wind and ocean currents) to the right in the Northern Hemisphere and to the left in the Southern Hemisphere. The magnitude of the Coriolis force (F_c) is given by F_c = 2 * m * v * ω * sin(φ), where m is the mass of the object, v is its velocity, ω is the angular velocity of the Earth’s rotation, and φ is the latitude.
Statement 1: The formula shows that F_c is directly proportional to the velocity (v) of the moving object. Thus, it increases with an increase in wind velocity. This statement is correct.
Statement 2: The term sin(φ) in the formula varies with latitude. At the equator (φ = 0°), sin(0°) = 0, so the Coriolis force is zero. At the poles (φ = 90° or -90°), sin(90°) = 1 or sin(-90°) = -1, giving the maximum magnitude (directional deflection is opposite). Thus, the Coriolis force is maximum at the poles and absent at the equator. This statement is correct.
Both statements are correct.

The Coriolis force is proportional to velocity and varies with latitude, being zero at the equator and maximum at the poles.

The Coriolis force acts perpendicular to the direction of motion. It is responsible for the deflection of winds and ocean currents, influencing large-scale atmospheric and oceanic circulation patterns, including the formation of cyclones (though it does not initiate them).