UGC NET Paper 2: Geography 19th June 2023 Shift 2 (Previous Year Paper)

The correct answer is B, D and E only 

Important Points

A. Lakshadweep does indeed have the highest proportion of the Muslim population in India.

B. The proportion of the Muslim population in the total population of West Bengal was lower than that in Assam as per the 2011 census.

C. The total population of Muslims in Kerala was indeed higher than in Jammu and Kashmir according to the 2011 census.

D. The proportion of the Muslim population in the total population of Uttar Pradesh was lower than in West Bengal as per the 2011 census.

E. The statement that Punjab has the lowest proportion of the Muslim population in comparison to other states of India is not accurate. There are several states in India with lower proportions of Muslim populations than Punjab.

So, based on this, the NOT true statements are B, D, and E.

Therefore, the correct answer from the options given is:

B, D and E only.

The correct answer is Statement I is correct, but Statement II is incorrect.

Key Points

Statement I: The sea waves of seismic origin in general, behave like long gravitational waves is true because:

• Nature of Tsunamis: Tsunamis, triggered by seismic events such as underwater earthquakes, volcanic eruptions, or landslides, generate waves that behave like long gravitational waves in the ocean.
• Wavelength: These waves have long wavelengths (often over 100 kilometers) and periods ranging from 10 minutes to several hours, making them distinct from shorter wind-driven waves.
• Shallow Water Waves: Despite their initial speed and energy, when they approach the shore, the waves slow down and increase in height due to the shallower water, behaving predictably as long gravitational waves.
• Gravitational Forces: The restoring force for these waves is gravity, which acts to bring the displaced volume of water back to equilibrium.
• Modeling: Tsunamis can be modeled using the shallow water equations (SWE), which describe the flow below a pressure surface in a fluid, serving as a basis for predicting wave behavior based on gravitational effects.

Statement II: The sea waves of shorter length will reach their maximum height fast, whereas a longer wave will take a long time is incorrect because:

• Wave Dynamics: The height and energy of waves are not solely dependent on their wavelength; rather, they are influenced by factors such as the depth of the water and the energy imparted by the seismic event.
• Wave Height and Energy: While shorter waves generated by local winds can grow rapidly under sustained wind speed, tsunamis (longer waves) gain height quickly when entering shallow coastal areas due to the conservation of energy and reduction in speed.
• Behavior of Tsunamis: As tsunamis move from deep to shallow water, their speed decreases and wave height increases rapidly. This phenomenon occurs relatively quickly and is influenced by the abrupt change in depth rather than the length of the wave itself.
• Misconception: The statement suggests an oversimplified view that shorter waves inherently reach maximum height faster, overlooking the complex physical processes and interactions with the sea floor and coastal topography.

Additional Information

• Tsunami Warning Systems: Understanding the behavior of tsunamis as long gravitational waves underpins the development of early warning systems. These systems rely on detecting the initial seismic event and predicting the wave's impact based on its long wavelength and potential energy.
• Wave Speed: In the open ocean, tsunamis travel at speeds exceeding 500 kilometers per hour, but their height is often less than a meter, making them barely noticeable. It is only when they approach the shallower waters of continental shelves that their height increases dramatically.
• Energy Conservation: The energy of a wave is a function of its height and wavelength. As a tsunami's wavelength decreases near the shore, its height must increase to conserve energy, aligning with the gravitational wave behavior.
• Impact of Coastal Geography: The topography of coastal regions greatly affects how and where tsunamis will increase in height and cause damage. Narrow bays and inlets can further amplify wave height, leading to more severe impacts locally.

The correct option is: A - III, B - IV, C - I, D - II.

Important Points

The correct answer from the options given is: Statement I is true but Statement II is false.

Important PointsStatement I: Icebergs are not common along the Norwegian coast.

• This is generally true. While there may be occasional sightings, the Norwegian coast is influenced by the North Atlantic Current (part of the Gulf Stream), which brings warmer waters to this area, reducing the likelihood of icebergs.

Statement II: Icebergs are very common along the Siberian coast.

• This is generally false.
• The Siberian coast, particularly its Arctic portion, is indeed cold and sees a lot of ice, but this is predominantly sea ice, not icebergs.
• Icebergs, which originate from the calving of glaciers, are more common off the coasts of Greenland and Antarctica. There are very few glaciers along the Siberian coast that could produce icebergs.

So, based on the above justification, the correct answer from the options given is:

Statement I is true but Statement II is false.

The correct answer is Yi-Fu-Tuan 

Important Points

• Humanistic geography is an approach to geography that emphasizes the human dimension, and it involves an interpretive, qualitative methodology.
• Among the scholars listed, Yi-Fu Tuan is particularly well-known for his work in this area.
• Tuan is a prominent geographer who has contributed significantly to the development of humanistic geography, particularly through his explorations of concepts like space, place, and landscape from a human-centric perspective.

So, the correct answer is:

Yi-Fu Tuan

Additional InformationYi-Fu Tuan, born in 1930 in China, is widely recognized as one of the founding figures of humanistic geography.

• After moving to the United States, he studied geography, anthropology, and philosophy, and he went on to teach at several universities.
• His interdisciplinary background greatly influenced his approach to geography.

Tuan is known for his contributions to the understanding of human geography, particularly in the areas of environmental perception and human spatial behavior.

• His work emphasizes the importance of personal perception and the subjective, emotional aspects of geographic space.
• He has developed and expanded on several key concepts in humanistic geography, such as "topophilia" (the affective bond between people and place) and "sense of place" (the unique, personal, and emotional attachment people have to a place).
• He has written numerous influential books, including "Space and Place:
• The Perspective of Experience," "Topophilia: A Study of Environmental Perception, Attitudes, and Values," and "Landscapes of Fear."
• These works explore various aspects of the human experience of space and place, and they have helped to define the field of humanistic geography.

So, while there are many scholars who have contributed to humanistic geography, Yi-Fu Tuan's work is particularly important and influential in this field.

• His ideas have been widely adopted and developed by other scholars, and his writings continue to be a major source of inspiration for research in humanistic geography.

The correct answer is Broek and Webb

Important Points

• The most widely accepted scheme of cultural realms of the world was devised by Jan O. M. Broek and Gordon M. Webb.
• They developed an influential model categorizing the world into different cultural realms, taking into account a wide range of factors including historical, linguistic, religious, and economic characteristics.

So, the correct answer is: Broek and Webb.

Key Points

• Jan O. M. Broek and Gordon M. Webb are notable geographers known for their work on the cultural realms of the world. They devised a system to categorize different areas of the world based on shared cultural characteristics.
• This was a major contribution to the field of cultural geography, as it provided a framework for understanding and comparing the cultural landscapes of different regions.
• In their scheme, a cultural realm is defined as a large area of the world where people share similar cultural traits.
• This includes traits like language, religion, economic systems, and political institutions.
• Some of the cultural realms identified in their scheme include the Anglo-American realm, the Latin American realm, the Islamic realm, the Sub-Saharan African realm, and the Confucian realm, among others.
• It's important to note that this kind of categorization is somewhat simplified, as it does not capture the full complexity and diversity of cultural traits within each realm.
• However, it provides a useful starting point for understanding the broad cultural patterns of the world.
• It's also worth noting that the concept of cultural realms is dynamic and evolves over time as cultural traits change and interact with each other.
• As such, the specific categorization of cultural realms may be updated or revised as our understanding of world cultures evolves.

In conclusion, Jan O. M. Broek and Gordon M. Webb have made a significant contribution to the field of cultural geography by providing a framework for understanding the cultural realms of the world.

The correct answer is C and E only  

Important PointsThe quantitative revolution in geography, which took place in the 1950s and 1960s, was an era where geographers sought to increase the mathematical content of their research and incorporate more statistical and empirical techniques. The movement was about increasing the precision and objectivity in the discipline.

Among the options provided:

A. Semple and Ratzel were influential geographers, but their work predates the quantitative revolution.

B. Similarly, Mackinder and Ritter were important figures in geography, but they were not leading figures in the quantitative revolution.

C. Peter Hagget is indeed associated with the quantitative revolution. However, William Bunge is more associated with radical geography, which was a critique of the quantitative revolution.

D. Kansky is known for his work in transportation geography which did utilize quantitative techniques, but Ratzel, a German geographer, is known for his work in political geography and anthropogeography, and his work predates the quantitative revolution.

E. Torsten Hägerstrand was a key proponent of the quantitative revolution, and Richard Chorley, an English geographer, also played a significant role in the revolution.

So, the correct answer from the options given is:

C and E only (Peter Hagget and Hagerstrand and Chorley)

The correct answer is Low trophic level.

Important Points

Organisms with 'r-selected' growth patterns tend to occupy low trophic levels in their ecosystems.

• The concept of "r-selected" species and "K-selected" species comes from ecological theories related to reproductive strategies.
• "r-selected" species are characterized by high reproductive rates, small body sizes, early maturity, and the ability to colonize new environments quickly.
• They typically have a type III survivorship curve, where many offspring are produced with low parental investment, but many also die at an early stage.

These characteristics are often associated with organisms that occupy lower trophic levels in ecosystems. These species are often the primary producers or herbivores that form the base of the food chain. They reproduce rapidly to take advantage of available resources and are adapted to environments with fluctuating or unpredictable conditions.

In contrast, "K-selected" species have slower reproductive rates, larger body sizes, and higher levels of parental investment. They tend to occupy higher trophic levels and are often top predators or apex predators in the food chain.

Therefore, the correct answer is option 1) Low trophic level.

The book 'Illustrations of the Huttonian Theory of the Earth' was written by: John Playfair

Important Points

• Joh n Playfair, a Scottish scientist and mathematician, wrote this work in 1802 to explain and expand upon the ideas of his friend James Hutton, the Scottish geologist often regarded as the father of modern geology.
• Hutton's theory, known as the Huttonian Theory, emphasized that the Earth was shaped by the same natural processes still in operation today, operating at similar intensities. Playfair's 'Illustrations of the Huttonian Theory of the Earth' was instrumental in popularizing these ideas, providing explanations and supporting evidence for Hutton's theories.
• The other options listed were not involved in the writing of this specific work.

Additional InformationJames Hutton's Theory:

• James Hutton, a pioneering geologist, developed the concept of uniformitarianism, asserting that the Earth's geological processes have remained consistent over time.
• His ideas were groundbreaking but were also complex and difficult for many to understand.

John Playfair's Contribution:

• John Playfair, a professor of mathematics and later geology, was a close associate of James Hutton.
• Recognizing the importance of Hutton's work but also its complexity, Playfair took on the task of explaining and promoting Hutton's theory.
• His book, 'Illustrations of the Huttonian Theory of the Earth,' served as an interpretation of Hutton's ideas, making them more accessible to a broader audience.

The correct answer is A - III, B - IV, C - II, D - I.

• A. Ahmad - Social Geography
• Emrys Jones and John Eyles - An Introduction to Social Geography
• A. P. Knox and S. Pinch - Urban Social Geography: An Introduction
• J.M. Rubenstein - The Cultural Landscape: An Introduction to Human Geography

A. P. Knox and S. Pinch - Urban Social Geography: An Introduction:

• This book introduces readers to the field of urban social geography.
• It explores how cities and urban spaces shape social interactions, cultural practices, and economic dynamics.
• It delves into topics such as urbanization, urban development, and the social dimensions of city life.

Emrys Jones and John Eyles - An Introduction to Social Geography:

• This book provides an introduction to the study of social geography, focusing on the interactions between society and space.
• It covers topics such as social inequalities, urban and rural spaces, and how people's identities and behaviors are influenced by their surroundings.

A. Ahmad - Social Geography:

• Authored by A. Ahmad, this book discusses the field of social geography, which examines the spatial distribution of human activities, behaviors, and interactions.
• It explores themes related to population, migration, cultural landscapes, and how society shapes and is shaped by its geographic context.

J.M. Rubenstein - The Cultural Landscape: An Introduction to Human Geography:

• Written by J.M. Rubenstein, this book offers an introduction to human geography with a focus on cultural landscapes.
• It explores how human activities and cultural practices shape the physical environment and vice versa.
• The book covers topics such as language, religion, ethnicity, and globalization's impact on landscapes.

Thus the correct matching of authors and book titles is indeed option 3:The correct answer is A - III, B - IV, C - II, D - I.

Landforms formed by erosional activities typically result from the wearing away of the earth's surface by wind, water, or ice. Among the given options, the correct erosional landforms are:

Yardang: Eroded by wind.

Stumps: Coastal erosion.

Cirque: Glacial erosion.

Arete: Glacial erosion.

Col: Erosion between two peaks.

Important Points

• Option A (Yardang and Stumps) contains erosional landforms.
• Option B (Cirque and Barchan) has one erosional landform (Cirque) and one depositional landform (Barchan, a sand dune formed by deposition).
• Option C (Arete and Esker) has one erosional landform (Arete) and one depositional landform (Esker, formed by glacial deposition).
• Option D (Blow Hole and Seif dune) has one erosional landform (Blow Hole) and one depositional landform (Seif dune).
• Option E (Structural bench and Col) has two erosional landforms

So, the correct answer is: A and E only.

The term "Demanufacturing" is associated with: Disassembly and  recycling.

Important Points

Demanufacturing refers to the process of disassembling products to recover and reuse their components, materials, or both.

• This practice is often carried out to promote recycling and minimize waste, aligning with the broader goals of sustainability and environmental stewardship.
• It's part of a larger movement towards a circular economy, where products are not simply discarded at the end of their life cycle but are instead broken down, with parts being reused or recycled.
• This reduces the need for raw materials, decreases pollution, and can conserve energy, contributing to overall environmental sustainability.
• The other options listed do not directly relate to the term "demanufacturing."

Additional Information

• Demanufacturing is fundamentally associated with disassembly and recycling.
• It promotes sustainable practices, aligns with the circular economy, aids in legal compliance, sparks innovation, creates economic opportunities, and reduces environmental impacts.
• It represents a conscious effort to move away from a disposable culture and towards a more sustainable approach to production and consumption.

The blue color of the sky is primarily caused by Rayleigh scattering.

So, the correct answer is: Rayleigh Scattering

Important Points

Rayleigh scattering occurs when light scatters in various directions without a change in wavelength.

• For the sky, shorter wavelengths of light (such as blue) are scattered much more widely than longer wavelengths (like red).
• This scattering of blue light in all directions gives the sky its characteristic blue color during clear weather.
• The other options listed do not describe the specific type of scattering responsible for the sky's blue appearance.

Additional InformationRayleigh Scattering:

• Rayleigh scattering is the scattering of light or other electromagnetic radiation by particles that are much smaller than the wavelength of the light.
• \In the atmosphere, these particles can be tiny air molecules, such as nitrogen and oxygen.

Wavelength Dependency:

• Rayleigh scattering is more effective at shorter wavelengths.
• Since blue light has a shorter wavelength compared to red, orange, yellow, and other colors, it is scattered in all directions more easily.
• This scattering of blue light creates the blue appearance of the sky during the day.

Sunset and Sunrise:

• During sunrise and sunset, the sky often appears red or orange. This effect is also due to Rayleigh scattering.
• As the sun is lower on the horizon, the light has to travel through a more extended path in the atmosphere, scattering more blue light out of our line of sight and allowing the longer wavelengths, such as red and orange, to reach our eyes.

Absence of Other Effects:

• The options of Mie scattering, nonselective scattering, and ground radiance don't adequately explain the blue color of the sky.
• Mie scattering pertains to the scattering by particles that are about the same size as the wavelength of light, typically affecting visibility but not primarily causing the blue sky.
• Nonselective scattering refers to scattering that doesn't favor any particular wavelength, and ground radiance does not have a direct effect on the color of the sky.

In summary, Rayleigh scattering is the key to understanding why the sky usually appears blue. It's a phenomenon that affects shorter wavelengths more, causing blue light to be scattered in all directions and dominate the color we see when looking up at the clear daytime sky

​​The scholar who was the first to report and map the Chinese coal fields was Richthofen. Therefore, the correct answer is Richthofen.

Important Points

• Baron Ferdinand Freiherr von Richthofen, better known in English as Baron von Richthofen, was a German traveler, geographer, and scientist. He is noted for coining the terms "Seidenstraße" and "Seidenstraßen" = "Silk Road" or "Silk Route" in 1877. He also standardized the practices of chorography and chorology.
• Ferdinand von Richthofen, a German geographer, was indeed the scholar who is credited with the first systematic exploration, reporting, and mapping of the Chinese coal fields.
• His contributions were instrumental in understanding the geological and mineralogical resources of China, particularly its coal reserves.
• One of Richthofen's significant achievements was the documentation and mapping of China's coal fields.
• Richthofen's extensive research culminated in the publication of his magnum opus, "China: Results of Observations and Research in China," which is often referred to as the "Richthofen's China."

thus the Ferdinand von Richthofen was the scholar who first reported and mapped the Chinese coal fields.

The migrants of the second wave of the Indian Diaspora went to settle in Thailand.

Important Points

The Indian diaspora refers to the scattering of people of Indian origin to various parts of the world. This migration has occurred in multiple waves throughout history. Here's an overview of the three waves of the Indian diaspora:

First Wave:

• The first wave took place during the British period when a large number of labourers were sent to Mauritius,Caribbean islands (Trinidad, Tobago and Guyana) ,Fiji and south Africa by British from uttar pradesh and Bihar; to Reunion Islands, Guadeloupe, Martinique and surinam by French and Dutch and by Portuguese from Goa, Daman and Diu to Angola,Mozambique to work as plantation workers.
• All such migration were covered under the time- bound contract known as Girmit Act ( Indian Emigration Act) . These labourers were living in inhuman conditions and their living conditions were as bad as those of slaves.

The second wave of migrants

• went to settle in the nighbouring countries like Thailand,Malaysia,Singapore, Indonesia,Brunei and some African countries.
• This is a recent development under which professional,artisans,traders,factory workers went out of the country in search of better quality of life.
• This trends is still countinuing In the 1970s,there was oil boom in West Asia and large number of skilled and semi - skilled workers went there to avail of the opportunity.some entrepreneur,store owner, professional,businessmen etc. went to western countries also.

 The third wave

• started in 1960s and still continuous to operate. In this period high profile professional like doctor,engineer etc.migrated out of India.
• In 1980s , software engineers, management consultants,financial experts,media person etc. moved out of the country to work in countries like the U. S. A, Canada, U. K, Australia,New Zealand,Germany etc.
• After liberalisation in 1991, education and knowledge base Indian migration has made Indian Diaspora most powerful in the world.

 Therefore, the correct answer is Thailand.

The correct answer is indeed option 3) A - IV, B - III, C - II, D - I.

Important Points

• The Literacy rate is defined by the percentage of the population of a given age group that can read and write.
• Literacy rate also called the Effective Literacy rate is the total percentage of the population of an area at a particular time aged seven years or above who can read and write with understanding.
• Effective Literacy Rate is calculated by dividing the number of literate persons aged 7 and above by the population aged 7 and above, multiplied by 100.

The correct answer is Place name analysis in the settlement study

Important Points

W. Arnold introduced the concept of using place name analysis as a method in settlement studies. 

• By analyzing the names of places, researchers can gain a deeper understanding of the historical, cultural, and geographical contexts that have shaped settlements.
• This method adds a linguistic and cultural dimension to the study of settlements, helping to create a more holistic and comprehensive picture of their development.
• Place name analysis, also known as toponymy, is a method used in geography and settlement studies to understand the history, cultural connections, and development of settlements based on the names of places and locations.
• This method involves examining the meanings and origins of place names to uncover valuable insights about the settlements they represent.

how place name analysis works and its significance in settlement studies:

• Origin and History: Place names often reflect the historical, cultural, and linguistic influences on a region.
• Cultural Significance: Place names can reveal the cultural heritage and practices of a settlement.
• Settlement Patterns: The distribution and patterns of place names can indicate settlement trends..
• Historical Evolution: Place names can provide a timeline of settlement evolution. Over time, names might change due to linguistic shifts, political changes, or historical events.

Thus The correct answer is Place name analysis in the settlement study

The correct answer is Both A and R are true and R is the correct explanation of A.

Important Points

Assertion (A) states that Christaller developed a network of hexagonal complementary areas in central place theory.

• This is true. Walter Christaller's central place theory proposed a hierarchical arrangement of settlements with hexagonal trade or market areas that minimize travel distances for consumers.

Reason (R) explains that the circular complementary areas in Christaller's theory had gaps and overlaps.

• This is also true. The hexagonal trade or market areas create circular zones around each central place.
• These circular areas may have gaps and overlaps to ensure efficient distribution of goods and services.

Both statements are true, and Reason (R) correctly explains Assertion (A), as the hexagonal network does lead to circular complementary areas with gaps and overlaps to optimize the distribution of resources and services.

The correct answer is A, C and D only

Important PointsCrop-combination regions refer to geographic areas where specific combinations of crops are cultivated. These regions are defined based on the types of crops grown within a particular area. Analyzing crop-combination regions provides insights into the diversity, distribution, and interactions of crops within an agro-climatic region. Provides a good basis for agricultural regionalization:

• Crop-combination regions involve categorizing areas based on the types of crops cultivated.
• While this might not directly correspond to traditional agricultural regionalization based on factors like climate, soil, and topography, understanding crop combinations can contribute to a nuanced view of agricultural diversity across regions.
• This information can enhance overall agricultural regionalization efforts.

 Helps in formulation of agricultural policy:

• The types of crops grown in an area significantly influence its agricultural economy and practices.
• When agricultural policymakers have knowledge about crop-combination regions, they can formulate more effective policies.
• For instance, policies can be tailored to support specific crops, provide incentives, or address challenges faced by farmers in different regions.

 Provides a comprehensive understanding of the agricultural mosaic of an agro-climatic region for planning and development of agriculture:

• Crop-combination regions reveal the mix and arrangement of crops within a given agro-climatic region.
• This comprehensive understanding assists in planning and developing agricultural strategies.
• It allows policymakers and planners to consider the existing strengths and weaknesses of each region, enabling them to optimize resources, improve productivity, and address specific agricultural challenges.

Therefore the crop-combination regions play a crucial role in understanding the diversity of crops grown in different areas. This knowledge is beneficial for agricultural regionalization, policy formulation, and holistic planning for agricultural development.

The correct answer is A and B only

Important Points

A. Buildings are usually built far apart in high latitudes:

• In higher latitudes, where the sun's angle is lower, buildings may be spaced farther apart to allow sunlight to reach the ground and buildings more effectively, especially during the colder months.
• As a result, buildings are often spaced farther apart to allow sunlight to reach the ground and buildings more effectively, especially during the colder months when maximizing sunlight exposure is important for warmth and energy efficiency.

B. Buildings are usually built closer together in tropics:

• In tropical regions near the equator, the sun is almost directly overhead, resulting in more intense and direct solar radiation.
• This can lead to higher temperatures and increased solar heat gain. To counteract excessive heat and provide shade, buildings are often constructed closer together.
• The arrangement of buildings can help create more shaded areas, reducing the exposure to direct sunlight and making the urban environment more comfortable.

therefore the relevant statements would be:A and B only:

The correct answer is B and C only B.

Brunhes and Sauer,  Both Paul Vidal de La Blache (Brunhes) and Carl Sauer were strong advocates of the idea of possibilism.

Important Points

Paul Vidal de La Blache (Brunhes):

• He was a French geographer known for his contributions to human geography.
• He emphasized that human actions and decisions play a crucial role in shaping how societies interact with their environment.
• He introduced the concept of "possibilism," which countered the deterministic view of environmental influences proposed by environmental determinism.
• He introduced the idea of the "cultural landscape" to highlight the human impact on the environment.

Carl Sauer

• An American cultural geographer, Sauer expanded on the ideas of possibilism introduced by Brunhes.
• He emphasized that human culture and activities are the primary drivers of landscape transformation.
• Sauer's cultural ecology approach stressed that people make deliberate decisions about land use, agriculture, and settlement patterns based on cultural practices and needs.
• He believed that the interaction between humans and the environment is complex and shaped by human choices.

. Febvre and Blache:Both Lucien Febvre and Paul Vidal de La Blache advocated the concept of possibilism.

Lucien Febvre:

• He was a French historian and co-founder of the Annales School of historical writing.
• While not a geographer, his ideas aligned with possibilism in geography. Febvre emphasized the importance of studying historical contexts and cultural factors when analyzing human actions and societal development.

Therefore  the scholars who strongly advocated the idea of possibilism were Paul Vidal de La Blache (Brunhes) and Carl Sauer.

the correct answer is:Option 2) C and E only

Important PointsSampling: The concept of sampling involves selecting a portion (sample) from a bigger group (the sampling population). There are three methods of sampling in research:

1. Random/Probability Sampling
2. Non-random/Non-probability Sampling
3. ‘Mixed’ Sampling

 Random/Probability Sampling: In this type, each element in the population has an equal and independent chance of selection in the sample.

Non-Random/Non-Probability Sampling Designs: These designs do not operate on the principle of randomization rather these are used when the number of elements in the population is either unknown or cannot be individually identified.

 Simple Random -

• This is a probability sampling technique where each member of the population has an equal chance of being selected.
• It is a valid probability sampling method.

 Stratified -

• This is a probability sampling technique where the population is divided into subgroups (strata) based on certain characteristics, and then samples are randomly selected from each stratum.
• It is a valid probability sampling method.

 Snowball -

• This is a non-probability sampling technique where initial participants are chosen, and then additional participants are recruited through referrals.
• It does not guarantee that each member of the population has a known, non-zero probability of being selected. So,
• it is not a probability sampling method.

 Cluster -

• This is a probability sampling technique where the population is divided into clusters, and then a random sample of clusters is selected, and all members within the selected clusters are included in the sample.
• It is a valid probability sampling method.

 Convenience -

• This is a non-probability sampling technique where the sample is chosen based on what is convenient or readily available.
• It does not guarantee that each member of the population has a known, non-zero probability of being selected.
• So, it is not a probability sampling method.

So, the correct answer is: C and E only C. Snowball and E. Convenience are not probability sampling techniques.

The correct answer is 2) B and D only.

Key Points

• The distribution of ocean currents is not affected by the distribution of density of the oceanic water.
• This statement is incorrect. The distribution of ocean currents is significantly affected by the differences in density, temperature, and salinity of oceanic water.
• Heat lost by the tropical oceans is the major source of heat needed to drive the atmospheric circulation.
• This statement is correct. The large amount of heat lost by tropical oceans plays a crucial role in driving atmospheric circulation.
• Most of the heat absorbed by the oceans in tropics is released as water vapour in polar areas.
• This statement is incorrect. Most of the heat absorbed by the tropical oceans is redistributed through atmospheric circulation rather than being directly released in polar regions.
• Less salty waters are at high latitudes.
• This statement is correct. High latitude regions tend to have lower salinity due to factors like melting ice and higher precipitation rates.

Additional Information

• Ocean currents:
• The circulation of ocean currents is influenced by various factors including the density of water, which is determined by temperature and salinity variations.
• Heat distribution:
• Tropical oceans absorb a significant amount of solar radiation, which is then transferred to the atmosphere and helps drive global atmospheric circulation patterns.
• While some heat is transported to higher latitudes, it is primarily via ocean currents and atmospheric processes rather than direct release as water vapour in polar areas.

the correct answer is:Option 1) Both Statement I and Statement II are true

Important Points

Statement I: "Highest concentration of scheduled caste population is in the Satluj-Ganga plains of India."

• This statement is generally true.
• The Satluj-Ganga plains, which include regions in northern India like Punjab, Haryana, and parts of Uttar Pradesh, do have a relatively high concentration of scheduled caste populations.

Statement II: "In terms of absolute number Christians are most numerous in Kerala state of India."

• This statement is true.
• Kerala has the highest absolute number of Christians among all Indian states.
• Christianity has a significant presence in Kerala, with a sizeable Christian population.

So, the correct answer is:Option 1) Both Statement I and Statement II are true.

the correct answer is: Option 4) A - II, B - I, C - IV, D - III

Key Points

Here's the correct match of List I with List II along with explanations and examples:

So, the correct answer is: Option 4) A - II, B - I, C - IV, D - III

the correct matches, the answer is:Option 2) A - IV, B - I, C - II, D - III

Key Points Here's the correct match of List I (Type of Industry) with List II (Place) along with explanations:

Based on the correct matches, the answer is:Option 2) A - IV, B - I, C - II, D - III

The functioning of an ecosystem depends on various factors, but the most appropriate answer among the options given is:Option 4) A, B, and C only

Important Points

 Energy Flow:

• Energy flow is fundamental to ecosystem functioning because all living organisms require energy to carry out life processes such as growth, reproduction, and maintaining bodily functions.
• Energy enters ecosystems primarily from the sun through photosynthesis in plants. Plants convert sunlight into chemical energy, and this energy is transferred to herbivores when they consume plants. This process continues as energy moves up the food chain from herbivores to carnivores.
• The flow of energy through trophic levels (producer, consumer, decomposer) in an ecosystem sustains life and supports ecological processes.

 Nutrient Cycles:

• Nutrient cycles, also known as biogeochemical cycles, are critical because they govern the availability and recycling of essential nutrients in an ecosystem.
• Key nutrient cycles include the carbon cycle, nitrogen cycle, and phosphorus cycle, among others.
• These cycles involve the movement of nutrients through the atmosphere, soil, water, and living organisms.
• Nutrients are essential for building biological molecules like proteins and nucleic acids. They are continuously recycled from living organisms to the non-living environment and back again. For example, decomposers break down dead organisms, returning nutrients to the soil for plants to use.

Biogeochemical Cycles:

• Biogeochemical cycles refer to the cycles of essential elements like carbon, nitrogen, and phosphorus as they move through the biological, geological, and chemical components of the Earth.
• These cycles involve both biotic (living organisms) and abiotic (non-living) components of ecosystems. They include processes like photosynthesis, respiration, decomposition, and geological processes.
• These cycles help maintain the balance of elements necessary for life. For example, the carbon cycle regulates the levels of carbon dioxide in the atmosphere, affecting global climate.

therefore the correct Option 4) A, B, and C only

The Telegraph Plateau is indeed located near Greenland. 

Important Points

The Telegraph Plateau is a prominent undersea feature located near Greenland in the North Atlantic Ocean. It is part of the larger North American Plate and represents a region where the seafloor rises to relatively shallow depths compared to the surrounding ocean basin.

• The Telegraph Plateau is a region of the North Atlantic that was supposed to be relatively flat and shallow compared to the rest of the ocean.
• The Mid-Atlantic Ridge is a mid-ocean ridge.
• It is a divergent or constructive plate boundary.
• It is located along the floor of the Atlantic Ocean.
• It is a part of the longest mountain range in the world.

The nomadic tribe that lives in northern Finland is known as the Sámi people. Option 2) "Lapps"

Key Points The Sámi People:

The Sámi people are the indigenous inhabitants of the northern regions of Finland, as well as Norway, Sweden, and parts of Russia. They have a distinct culture, language, and way of life that is closely tied to the Arctic environment in which they live.

Language and Culture:

• The Sámi people have their own Sámi languages, which are a group of Uralic languages.
• These languages have several dialects and are an important part of Sámi culture and identity.

Historical Term "Lapps":

• The term "Lapps" has been historically used to refer to the Sámi people. However, it is considered outdated and potentially derogatory today.

The term "Lapps" likely originated from words in Scandinavian languages and was used by outsiders to describe the Sámi. It does not have the same cultural significance or respect as the term "Sámi."

The use of the term "Lapps" has been criticized because it does not accurately represent the Sámi people's identity and cultural diversity.

 Additional InformationYukaghir:

• The Yukaghir are indigenous people who traditionally lived in the Siberian region of Russia, particularly in the Yakutia and Chukotka areas.
• They have a distinct language and a history of hunting, fishing, and reindeer herding.

The Warlpiri

• The Warlpiri are an Indigenous Australian people who primarily inhabit the Northern Territory of Australia.
• They have a rich cultural heritage, with Dreamtime stories and art being central to their identity.
• They are known for their connection to the land and spirituality.

Kirghiz (Kyrgyz):

• The Kirghiz, also known as the Kyrgyz, are a Turkic ethnic group primarily located in Central Asia, particularly in Kyrgyzstan.
• They have their own language and nomadic heritage. The traditional yurt is an iconic symbol of their culture, and they have a history of pastoralism and horsemanship.

The correct answer is option 3) "B and D only."

Important PointsWelfare geography is a branch of human geography that studies how resources, opportunities, and well-being are distributed across different geographic areas, focusing on understanding and addressing inequalities and disparities in access to essential services and benefits.

• A. This statement is not correct. Welfare geography was not necessarily revolutionary in theory and practice. While it aimed to address issues related to inequalities and welfare, it did not necessarily represent a revolutionary approach.

B. This statement is correct. The basis of welfare geography is indeed focused on "who gets what, where and how." It examines spatial variations in the distribution of resources and benefits.

• C . This statement is not correct. Welfare geography is not necessarily based on positivism. It encompasses a range of theoretical perspectives and methodologies.

D. This statement is correct. Welfare geography is a pragmatic approach aimed at overcoming problems of inequalities by studying the spatial distribution of resources and welfare.

So, the correct answer is option 3) "B and D only."

The correct answer is option 1) "A, B and D only."

Important Points

A. Trade disputes between and among countries are handled constructively.

• This statement is true.
• One of the primary functions of the World Trade Organization (WTO) is to provide a platform for member countries to resolve trade disputes through constructive negotiations and legal mechanisms.

B. Liberalized global trade provides a greater choice of products and their qualities.

• This statement is true.
• One of the benefits of liberalized global trade,
• promoted by the WTO, is that it allows for a wider variety of products and qualities to be available in international markets, often at competitive prices.

C. Rules make life difficult for all.

• This statement is not accurate.
• While some may argue that certain WTO rules can be challenging for specific industries or countries,
• the overall aim of the WTO is to create a rules-based system that promotes fairness and stability in global trade, benefiting the majority of its member countries.

D. The liberalized trade cuts the cost of living.

• This statement is true.
• Liberalized trade can lead to lower costs of living for consumers because it can result in increased competition,
• lower prices for imported goods, and improved access to a variety of products.

E. This system promotes conflicts.

• This statement is not accurate.
• The WTO is designed to reduce trade conflicts by providing a structured framework for negotiations and dispute resolution.
• While conflicts may arise from time to time, the primary goal of the WTO is to promote cooperation and reduce trade-related disputes.

So, option 1) "A, B and D only" is the correct answer as it includes the statements that are true regarding the benefits of the WTO.

Aurora Australis is related to the Southern Hemisphere.

So, the correct answer is option 3) "Southern Hemisphere."

Important PointsAurora Australis Definition:

• Aurora Australis, also known as the Southern Lights, is a natural light display that occurs in the Earth's polar regions, specifically in the Southern Hemisphere.
• It is the counterpart to the Aurora Borealis, or the Northern Lights, which occur in the Northern Hemisphere.

Cause of Aurora Australis:

• Auroras, both in the Southern and Northern Hemispheres, are caused by the interaction between charged particles (electrons and protons) from the Sun and the Earth's magnetic field.
• When these charged particles collide with gases in the Earth's atmosphere, they emit colorful light, creating the spectacular natural phenomenon known as the Aurora.

Southern Hemisphere Location:

• Aurora Australis is observed in regions near the South Pole, including Antarctica, southern parts of Australia, New Zealand, and other southern polar regions.
• These areas are known for their pristine night skies, making them ideal for viewing this celestial display.

Additional Information

• Aurora Borealis is also known as 'Northern Lights' or 'Polar lights'.
• It is a phenomenon that is seen in the sky in the northern hemisphere, generally in the higher altitudes.
• The places where this phenomenon can be observed are - most of Alaska, northern parts of Canada, southern-half of Greenland, Iceland, Norway, Sweden, etc.

the correct answer is Option 1) "B and E only" 

Important Points

• The common range of ocean salinity ranges between 33-37 grams per liter (33 - 37%).
• In sea water, there are commonly 35 grams of dissolved salts in each liter.
• The salinity in the Indian Ocean is in the middle of 3.2 and 3.7 percent.
• The highest level of salinity is in the Arabian Sea and along a belt of water situated between southern Africa and southwestern Australia.

B. The salinity in the Indian Ocean decreases from the equator towards the Bay of Bengal.

• This statement is correct.
• As you move from the equatorial regions towards the Bay of Bengal, the salinity in the Indian Ocean generally decreases.
• This decrease is due to the significant freshwater input from rivers and monsoon rains that flows into the Bay of Bengal, reducing the overall salinity.

E. Salinity is more in the Arabian Sea than the Bay of Bengal.

• This statement is correct.
• In the Indian Ocean, the salinity is typically higher in the Arabian Sea compared to the Bay of Bengal.
• The Arabian Sea experiences greater evaporation rates and receives less freshwater input compared to the Bay of Bengal, which leads to higher salinity levels in the Arabian Sea.

 the correct answer. Option 1) "B and E only" accurately describes the salinity patterns in the Indian Ocean during the northern summer.

the correct answer is indeed option 1) "A and B only," as statements A and B are correct. 

Important PointsTide 

• The periodical rise and fall of the sea level, once or twice a day, mainly due to the attraction of the sun and the moon, is called a tide.
• The movement of water caused by meteorological effects (winds and atmospheric pressure changes) are called surges (storm surges during cyclones).

A. The attraction of the moon is maximum at the point which is closest to the moon on the earth's surface.

• This statement is correct.
• The gravitational attraction between the moon and Earth is strongest at the point on Earth's surface closest to the moon, which creates a high tide.

B. Distance is a very important variable.

• This statement is correct.
• Distance is indeed a critical variable in determining the strength of tidal forces.
• The closer celestial bodies (moon and Sun) are to Earth, the stronger their gravitational influence on tides.

C. The attraction of the moon is minimum at the point which is closest to the moon on the earth's surface.

• This statement is not correct.
• The attraction of the moon is maximum at the point on Earth's surface closest to the moon, creating a high tide at that location.

D. The tide-generating forces are very large in magnitude compared to the gravitational forces.

• This statement is not correct.
• The tide-generating forces are a result of gravitational forces, primarily from the moon and the Sun.
• Gravitational forces are fundamental to creating tides, and they are not smaller in magnitude than tide-generating forces.

Given this clarification, the correct answer is indeed option 1) "A and B only," as statements A and B are correct.

Cultural eutrophication is primarily caused by option 3) "Nutrients added into the water bodies by anthropogenic factors."

Important Points

Cultural eutrophication occurs when human activities, such as the release of excess nutrients (e.g., nitrogen and phosphorus) from agricultural runoff, sewage discharge, and industrial processes, lead to an overabundance of nutrients in aquatic ecosystems. 

• Nutrient enrichment of lakes at an accelerated rate is caused by human activities and the consequent ageing phenomenon is known as ‘cultural eutrophication’.
• Activities like the discharge of wastewaters or agricultural runoff cause cultural eutrophication.
• The nutrient-enrichment of the lakes promotes the growth of algae, aquatic plants and various fauna. This process is known as natural eutrophication.
• It is fundamentally generated by the leaching of phosphate and nitrate containing fertilisers from agricultural lands into lakes or rivers.
• There are various effects of eutrophication like change in the ecosystem, decreased biodiversity and new species invasion.

therefore the correct answer is "Nutrients added into the water bodies by anthropogenic factors."

The correct option is 4 ​A - IV, B - III, C - II, D - I

Important Points

 here's a table explaining each sector of the economy (Primary, Secondary, Tertiary, and Quaternary) along with the corresponding activities:

• Primary Sector:
• The primary sector of the economy involves activities related to natural resources and raw materials. It includes activities such as agriculture, fishing, mining, and forestry.
• In this case, "Pearl culture" falls under the primary sector because it involves cultivating pearls within oysters, which is a form of aquaculture and relies on natural resources (oysters and water bodies).
• Secondary Sector:
• "Brick-making" is an example of a secondary sector activity because it involves the manufacturing of bricks from raw materials like clay or concrete.
• The secondary sector involves manufacturing and processing activities. It includes industries that transform raw materials into finished products.
• Tertiary Sector:
• The tertiary sector encompasses service-based activities. It includes services such as retail, healthcare, education, and transportation.
• "Postal services" belong to the tertiary sector because it involves the operation of mail and package delivery services, which are service-oriented and do not involve the production of physical goods.
• Quaternary Sector:
• The quaternary sector involves knowledge-based activities related to information technology, research, and development.
• "Singing" is an example of a quaternary sector activity when it involves professional vocalists who may engage in research, innovation, and the creation of new music or compositions.

The correct answer is John Friedmann 

Important PointsThe person among the following who enunciated four stages in the evolution of space economy is "1) John Friedmann".

John Friedmann is a noted planner and geographer known for his work on regional development, urbanization, and spatial economic theory.

• His stages of spatial economic development outline how economic activities and the organization of space have transformed over time due to changes in technology, economic systems, and societal structures.
• His approach focuses on the role of central places (such as cities) in organizing the economy and how this role has evolved over time.

Additional Information

Karl Marx:

• A philosopher, economist, and sociologist, Marx's work mostly focused on class struggle, capitalism, and the theory of historical materialism.
• He didn't specifically outline stages of spatial economic evolution.

Ronald F Abler:

• A geographer and former executive director of the American Geographical Society, Abler has contributed to several areas of geography, but he isn't known for outlining stages of spatial economic evolution.

August Losch:

• An economist and geographer, Losch is known for his work on location theory and the spatial organization of industries.
• While his work is related to spatial economics, he didn't propose a four-stage model of its evolution

the correct chronological order is option 2) "B, D, C, A."

Important PointsThe correct chronological order of the social-ecological movements is: 

 Chipko Movement -

• This movement originated in the 1970s in India, primarily in the state of Uttarakhand.
• It involved people hugging or "clinging" to trees to protect them from being cut down, thus promoting forest conservation.

 Jungle Bachao Andolan -

• This movement was initiated in the late 1970s and early 1980s in the Singhbhum district of Bihar (now in Jharkhand) and aimed to protect the forests and natural resources of the region.

Narmada Bachao Andolan -

• This movement began in the 1980s and was primarily focused on protesting the construction of large dams, particularly the Sardar Sarovar Dam, on the Narmada River in India.
• It was led by social activist Medha Patkar.

 Aarey Movement, Mumbai -

• The Aarey Movement gained prominence in the late 2010s when it protested the proposed construction of a car shed for the Mumbai Metro in Aarey Colony, a green area in Mumbai.
• The movement aimed to protect the ecological significance of the region.

So, the correct chronological order is option 2) "B, D, C, A."

The color that is not a part of the rainbow is: Grey

Important PointsThe colors of the rainbow, in order, are red, orange, yellow, green, blue, indigo, and violet (often remembered by the acronym ROYGBIV). Grey is not included in this spectrum.

• A rainbow is a meteorological phenomenon that is caused by reflection, refraction, and dispersion of light in water droplets resulting in a spectrum of light appearing in the sky.
• This light takes the form of a multicoloured circular arc with the following colors in order: red, orange, yellow, green, blue, indigo, and violet. These colors are often remembered by the acronym ROYGBIV.
• Each color in a rainbow corresponds to a different wavelength of light. When sunlight enters a raindrop, the different wavelengths of light are refracted, or bent, at different angles — this is what causes the different colors to spread out into an arc.
• The color grey, however, is not part of the visible light spectrum. It is an achromatic color, a 'color without color', composed of a mixture of all frequencies of light in the visible spectrum.
• Because of this, grey does not appear in a rainbow, as a rainbow only includes colors that are found in the visible spectrum of light.

The correct answer is A and B only  

Important PointsFlood Zonation (A):

• This involves the demarcation or mapping of areas based on their susceptibility to floods.
• It's a strategic approach that involves understanding and classifying regions based on flood risk.
• This information is particularly useful in land-use planning and can help avoid or at least minimize the damage caused by floods.
• For example, high-risk flood zones can be reserved for non-residential use or green spaces.

Flood Forecasting (B):

• Flood forecasting involves predicting when and where flooding is likely to occur.
• It uses real-time weather data and hydrological models to estimate river flows and water levels.
• The forecasts can provide timely warnings to communities in the path of a flood, giving them time to evacuate or take other necessary measures to minimize property damage and loss of life.
• Advanced technology, such as remote sensing and geographical information systems (GIS), can greatly improve the accuracy of these forecasts.

Both of these measures are "non-structural" because they don't involve constructing physical structures like dams or levees. Instead, they rely on data, planning, and communication to reduce the impact of floods. These methods are often more sustainable and cost-effective than structural measures

The correct answer is A, B, D, C.

Important Points

The stages involved in boundary creation generally follow this sequence:

Allocation:

• This refers to the process of deciding where the boundary should be in broad terms.
• In this stage, the countries involved agree on the general area where the boundary will be placed.

Delimitation:

• In this stage, the boundary is defined and drawn with greater precision on a map, based on the decisions made in the allocation stage.

Demarcation:

• This involves marking the boundary on the ground with physical objects like signs, fences, or walls based on the delimitation stage.

Maintenance:

• This is the final stage where countries work to maintain and manage the boundary.
• This might include patrols, management of cross-border movement, and sometimes dispute resolution.

Therefore, the correct sequence of the stages through which a new boundary under most conditions is determined is A, B, D, C.

So, the correct option is:

A, B, D, C.

The correct answer is 4) A and C only.

Key Points

• Bihar has the largest number of scheduled caste population among all the major states of India. This statement is incorrect.
• As of the 2011 Census, Uttar Pradesh has the largest Scheduled Caste (SC) population in India, not Bihar.
• Bihar also has a significant SC population but not the largest in comparison to Uttar Pradesh.
• **Punjab has the highest percentage share of scheduled castes in its total population.**​This statement is correct.
• As per the 2011 Census, Punjab has the highest proportion of SCs in terms of percentage of its total population.
• SCs constitute about 31.94% of Punjab's total population.
• Maharashtra has the third largest population size of scheduled castes in India. ​This statement is incorrect.
• According to the 2011 Census, West Bengal has the third largest SC population, not Maharashtra.
• Maharashtra ranks fourth in terms of SC population size.
• Tamil Nadu has more scheduled caste population than Andhra Pradesh. ​This statement is correct.
• According to the 2011 Census, Tamil Nadu has a significant SC population that is indeed larger than that of Andhra Pradesh.
• The SC population in Tamil Nadu is significant due to various socio-economic factors unique to the state.

Additional Information

• Uttar Pradesh has the largest SC population in India.
• This statement is correct.
• Uttar Pradesh accounts for a major share of the SC population in the country.
• The SC demographic in Uttar Pradesh is a result of historical, social, and migration patterns.
• Maharashtra, despite having a large SC population, does not rank third but fourth according to the 2011 Census.
• Census 2011 (for Schedule caste)
• A census is nothing but a process of collecting, compiling, analyzing, evaluating, publishing, and disseminating statistical data regarding the population.
• The first time the word schedule caste was used was in the Government of India Act 1935.
• Schedule caste is mentioned in the Indian constitution under Article 341.
• The population of Schedule caste as a percentage of the total population of India is 16.6%.
• The decadal growth rate of Schedule caste is 20.8%.
• Uttar Pradesh (35,148,377) has the most significant number of Scheduled Caste population.
• West Bengal (18,452,555) is second and Bihar (13,048,608) is the third-largest state. Hence statement 2 is incorrect.
• Mizoram has the lowest number of Scheduled Caste population.
• Punjab (31.9%) has the highest proportion of Scheduled Castes in terms of percentage of the total population.
• Mizoram has the lowest proportion of Scheduled Castes in terms of percentage of the total population.

the correct order is A → B → D → C in terms of ascending population density as per the 2011 Census data.

Key Points

the states in ascending order of population density based on the 2011 Census data:

• Rajasthan - Population Density: Approximately 200 people per square kilometer.
• Odisha - Population Density: Approximately 270 people per square kilometer.
• Kerala - Population Density: Approximately 860 people per square kilometer.
• Uttar Pradesh - Population Density: Approximately 829 people per square kilometer.

Now, arranging them in ascending order:

• . Rajasthan - Population Density: Approximately 200 people per square kilometer.
• Odisha - Population Density: Approximately 270 people per square kilometer.
• Uttar  Pradesh - Population Density: Approximately 829 people per square kilometer.
• Kerala - Population Density: Approximately 860 people per square kilometer.

So, the correct order is A → B → D → C in terms of ascending population density as per the 2011 Census data.

Additional Information

Population density: 

• Population density can be defined as the number of people per unit of area, usually quoted per square kilometer or square mile.
• So, population density is the number of individuals per unit geographic area, for example, the number per square meter, per hectare, or square kilometer.
• Population Density = Total population/ Total area
• In India, state-wise highest population density was recorded in Bihar (1102 persons/ sq. km)
• The lowest density of population found in the state of Arunachal Pradesh (17 persons/ sq. km)

the correct matching is:: A - III, B - IV, C - II, D - I

Key Points

***therefore the correct answer is  *A - III, B - IV, C - II, D - I

Additional Information

The correct answer is Option 2: B and C only.

Important Points

The standard error measures how much the sample mean is expected to vary from the true population mean. It takes into account the sample size and sample standard deviation— It's a key concept in understanding the reliability of sample statistics.

 Grand Mean:

• The grand mean is the mean of means from different samples.
• It is not directly used in calculating the standard error of the mean.

 Size of the Sample:

• The size of the sample (sample size) directly affects the standard error of the mean.
• As the sample size increases, the standard error tends to decrease.
• This is because larger sample sizes provide more reliable estimates of the population mean.

Sample Standard Deviation:

• The sample standard deviation is used to quantify the spread or dispersion of data within a sample.
• It is a crucial component in calculating the standard error of the mean.
• The formula for the standard error of the mean involves dividing the sample standard deviation by the square root of the sample size.

 Sampling Distribution of Mean:

• The standard error of the mean accounts for the variability in the sampling distribution of the mean.
• However, it is not directly calculated based on the sampling distribution itself.

 Population Mean:

• The population mean is not directly used in calculating the standard error of the mean.
• The standard error focuses on the variability of the sample mean as an estimate of the population mean.

In summary, the correct options are B and C because the standard error of the mean is influenced by the sample size (B) and the sample standard deviation (C).

the correct answer is Option 3: A, B, and C only.

Important Points

Photosynthetic green plants, photosynthetic bacteria, and chemosynthetic bacteria all contribute to primary production by creating energy-rich compounds using different energy sources and processes. Frogs, on the other hand, are consumers within the trophic levels.

Photosynthetic green plants:

• Photosynthetic green plants are primary producers in terrestrial and aquatic ecosystems.
• They use sunlight, water, and carbon dioxide to perform photosynthesis, producing energy-rich sugars and oxygen.

 Photosynthetic bacteria:

• Certain bacteria, such as cyanobacteria (blue-green algae), can perform photosynthesis.
• These bacteria contribute to primary production in various environments, especially aquatic ecosystems.

 Chemosynthetic bacteria:

• Chemosynthetic bacteria are found in extreme environments like deep-sea hydrothermal vents.
• They use chemicals (often from sulfur compounds) instead of sunlight to produce energy through chemosynthesis.
• These bacteria play a crucial role in ecosystems where sunlight is absent, like the deep ocean floor, and they provide energy to the organisms in those environments.

 Frogs:

• Frogs are not producers; they are consumers.
• They belong to the category of primary consumers, as they typically feed on plants and/or other organisms for energy.
• Frogs are part of the trophic levels where energy flows from producers to consumers and then to higher-level consumers.

In summary, the correct answer is Option 3: A, B, and C only.

The correct answer is : B and C only.

Important Points

 About 70 per cent of the population lives in villages in India:

• This statement is correct.
• approximately 70% of India's population resides in rural areas.

 Indian rural society is still semi-feudalistic:

• The Bihar region (now a state) of India was a hotbed for feudalism. Feudal lords ruled the region for decades; semi-feudal conditions still exist.
• As a result, child malnourishment is common, in spite of modern Bihar's status as having the fastest growth in gross domestic product in India.

The other statements have nuances that need consideration.

The gap between rural and urban quality of life is relatively wide in India, despite efforts to bridge it.

• Indians living in rural area, there is a wide gap between the rural and the urban India with respect to livelihood, living conditions and economic empowerment.
• Many in rural India also lack access to education, nutrition, health care, sanitation, land and other assets and therefore persist in poverty.

The proportion of rural population is not highest among states in Bihar;

• Uttar Pradesh is indeed one of the states in India with the largest rural population. As of my last update in September 2021
• Uttar Pradesh had a significant rural population, contributing to its overall demographic landscape.

So, the correct answer is Option 2: B and C only.

The correct answer is : A and B only.

Key Points

• According to Census 2011, Meghalaya has registered the highest decadal growth rate during 2001-11 i.e 27.80%.
• However, if we compare all states and UTs, then the highest decadal growth is registered by Dadra and Nagar Haveli is 55.50%.
• The lowest Growth Rate has been of Nagaland – Negative 0.47%, followed by Kerala – 4.86%.

The top five states with the highest decadal growth rate in India are as follow:-

The correct answer is  A, C and E only.

 Important Points

In 2017, the Central Government launched the National Health Policy to replace the existing health policy of 2002. 

There is a need to develop a new healthcare policy due to two main factors.

• There is an increase in the number of non-communicable diseases, illnesses not caused by germs.
• Secondly, the healthcare industry is growing fast and is estimated to continue to expand quickly.

 Increase of life expectancy at birth to 70 years by 2025.

• This is one of the objectives of India's National Health Policy, 2017.
• It aims to increase the life expectancy at birth to 70 years by 2025.

Reduction in infant mortality rate to 28 by 2019.

• This is also one of the objectives of the National Health Policy, 2017.
• It aims to reduce the infant mortality rate to 28 per 1,000 live births by the year 2019.

Reduction of total fertility rate (TFR) to 2.1 at the national and sub-national level by 2025.

• This is another objective of the National Health Policy, 2017.
• It aims to reduce the total fertility rate (TFR) to 2.1 or below at both the national and sub-national levels by the year 2025.

 Increase of health expenditure by the Government to 5.0 per cent of GDP by 2025.

• This statement is not part of the National Health Policy, 2017.
• The policy does emphasize increasing health expenditure, but it does not specify a target of 5.0 per cent of GDP by 2025.

 Reduction of Maternal Mortality rate to 200 by 2020.

• This statement is not consistent with the National Health Policy, 2017.
• The policy aims to reduce the Maternal Mortality Ratio (MMR), but it does not mention a specific target of 200 by 2020.

Therefore, the correct answer is option 4) A, C and E only as these statements accurately reflect the objectives of India's National Health Policy, 2017.

Additional Information

Key Features of National Health Policy 2017

• To provide superior healthcare services to all age groups and genders.
• To ensure universal high-quality healthcare services at an affordable cost.
• Promoting a healthcare-oriented approach in all development policies.
• The goal is to lower the number of people who die too soon from cancer, heart disease, breathing problems, and diabetes by 25% before 2025.
• To recognize the importance of sustainable development and setting time-bound quantitative goals.
• The goal is to improve healthcare in all aspects, including services that help people stay healthy, feel better when sick, and recover from illnesses.

Human ecology is one of the most influential theories explaining the growth of cities. This perspective involves the application of ideas from plant and animal ecology to the study of the relationship between humans and their physical habitat.

Key Points

• An early model of human ecology was developed by Burgess and is called the ‘concentric zone model.’

• This model uses terms such as segregation, competition, invasion, succession, and natural areas to explain patterns of behavior in urban spaces.

• Segregation refers to the tendency for particular types of groups or enterprises (e.g., different ethnic or income groups, commercial, or residential activities) to cluster and segregate themselves by excluding other activities from their territory.

• When such entities are successful in creating a relatively exclusive area or homogeneous neighborhood they are said to have formed a natural area.

The Buran is a wind that blows in the steppes of Russia, especially in Siberia. It's a strong, cold, and often dry wind.

So, the correct answer from the options given is:

Russia

Important PointsLocation:

• The Buran wind is most commonly found in the steppes and plains of Siberia in Russia, although it can also affect other parts of Central Asia.

Nature:

• Buran is known to be a strong and cold wind. It is typically associated with winter and can bring severe cold snaps.
• In some cases, the wind can be dry, but it can also carry snow, leading to blizzards.

Effects:

• The impact of the Buran wind can be quite harsh, especially in the already cold Siberian climate.
• It can cause significant drops in temperature, making the weather extremely cold in a short period.
• This can have effects on agriculture, transportation, infrastructure, and daily life in the affected regions.

Meteorological Background:

• The Buran wind develops due to specific meteorological conditions in the region, including the interaction of high-pressure systems with the unique geographical features of Siberia and Central Asia.
• The vast, open landscapes of the steppes facilitate the movement of this wind, allowing it to gain speed and force.

In summary, the Buran is a distinct wind phenomenon primarily associated with Siberia in Russia, characterized by its strength, coldness, and potential to carry snow. It plays a significant role in the local climate and has a broader cultural resonance in the region.

In the context of regional planning, understanding the region as a sub-system of the regional system as a whole aligns with the concept of interconnectedness and the idea that different regions interact and depend on one another.

Among the options provided, this idea is best encapsulated in:

The principle of horizontal spatial unity

Important Points

• This principle emphasizes the interconnectedness of different regions or sub-systems, viewing them as parts of a larger spatial whole.
• It recognizes that changes or developments in one area can have impacts on adjacent areas, reflecting the idea that each region is interrelated and functions as part of the entire system.

Key PointsThe Principle of Vertical Unity of Phenomena:

• This principle refers to the interconnectedness of various phenomena at different levels or scales, such as local, regional, national, or even global.
• It highlights how activities or patterns at one level can affect those at other levels.
• While this concept recognizes interconnections, it is typically more about the relationships between different hierarchical levels rather than considering each region as a sub-system of the whole.

The Principle of Horizontal Spatial Unity:

• This principle emphasizes the idea that regions or spatial areas are interconnected and cannot be viewed in isolation.
• It looks at the horizontal relationships between areas, focusing on their interdependencies and interactions.
• This principle aligns most closely with the idea that each region is considered a sub-system of the regional system as a whole, understanding that changes in one area can affect others.

The Principle of Space-Time Continuum:

• This principle takes into account both spatial and temporal dimensions.
• It emphasizes the idea that space and time are interrelated and that understanding phenomena requires considering both how things are arranged in space and how they change over time.
• It's more about understanding the dynamic aspects of space and time rather than focusing on regions as sub-systems of a whole.

The Principle of Comprehensive Development:

• This principle refers to a holistic approach to planning that takes into account all relevant factors and aspects, aiming for balanced and all-encompassing growth.
• While it involves a broad view of development, it doesn't specifically relate to the concept of regions as sub-systems of a larger whole.

So, with a more detailed examination, the option that best fits the concept of each region being considered as a sub-system of the regional system as a whole remains:

The principle of horizontal spatial unity

It acknowledges the spatial relationships and interdependencies between different regions, recognizing that they function together as part of a more extensive system.

the correct answer is option 2) "A, C, and D only."

Important Points

The correct statements are:

A. Griffith Taylor gave a classification of cities based on age.

• This statement is correct.
• Griffith Taylor proposed a classification of cities based on their age or stage of development.

C. Sector model of Hoyt was based on the study of spatial patterns of house rents in American cities.

• This statement is correct.
• Hoyt's sector model of urban development was indeed based on the study of spatial patterns of house rents in American cities.

D. Chandigarh was planned by Le Corbusier and Canberra by Walter Burley Griffin.

• This statement is correct.
• Chandigarh was planned by the Swiss-French architect Le Corbusier, and Canberra was planned by the American architect Walter Burley Griffin.

So, the correct answer is option 2) "A, C, and D only."

The correct answer is Rural Urban Continuum.

Important Points

Louis Wirth is best known for his work in urban sociology and his concept of "Urbanism as a Way of Life," in which he explores the effects of urban living on individuals and communities. However, of the options you've given, Wirth is most closely associated with the concept of the Rural-Urban Continuum.

• Louis Wirth defined a city to have defining characteristics that included a large population, size, a heterogeneous nature, and a defined boundary.
• A city is identified by businesses, population, and a unique cultural landscape.
• Urban locations include non-rural areas like a city and the surrounding suburbs.
• Major characteristics of cities include having downtown areas, buildings, highways, and other transportation networks.
• Businesses, a large population, and a unique cultural landscape identify a city, whereas urban locations include non-rural areas like the city and suburbs.
• Common characteristics of significant cities include having a downtown area, large buildings, and a highway and transportation network.

The correct answer is A and C only.

Important Points

• The term "photoperiod" refers to the duration of an organism's daily exposure to light, or the length of daylight experienced in a 24-hour period.
• This is influenced by the tilt of the Earth's axis and the planet's rotation around the sun, creating variation throughout the year and differences between latitudes.

From the options you've given:

A. "Longer the photoperiod the greater is the total possible insolation.

• " This statement is true. Insolation refers to the amount of solar radiation reaching a given area.
• With a longer photoperiod, or more hours of daylight, there's more time for solar radiation to reach the Earth, and thus the total possible insolation is greater.

B. "At poles day and night are always equal.

• This statement is false.
• At the poles, the amount of daylight changes dramatically over the course of the year.
• Around the equinoxes, day and night are roughly equal, but at the solstices, one will have 24 hours of daylight (the summer solstice) and the other will have 24 hours of darkness (the winter solstice).

C. "At poles the daily photoperiod reaches a maximum of 24 hours in summer and a minimum of zero hours in winter.

• " This statement is true. During the summer solstice, the poles experience 24 hours of daylight, and during the winter solstice, they experience 24 hours of darkness.

D. "At poles the daily photoperiod reaches a maximum of 24 hours in winter and a minimum of zero hour in summer."

• This statement is false.
• It's the opposite, as explained in option C.

So, the most appropriate answer from the options given would be "1) A and C only."

The correct answer is Colours.

Important Points

• Chorochromatic maps use colors to represent geographical data. These maps often use different colors to indicate different categories of data.
• For example, a chorochromatic map might use one color to represent mountainous areas, another color to represent plains, and yet another to represent bodies of water.

Therefore, the correct answer from your options is "1) Colours"

Additional Information

Lines:

• In cartography, lines are typically used to represent features that are linear in nature, such as roads, rivers, or boundaries. Isoline maps, which include contour maps, use lines to connect points of equal value.
• For example, on a contour map, each line represents a specific elevation above sea level.

Points:

• Point symbols are used to represent specific locations or discrete data points on a map.
• These can include things like cities, individual landmarks, or data sampling locations.

Pictures:

• Pictorial symbols or pictograms, which can be considered as a type of picture, are often used on maps to represent particular features or points of interest.
• For example, a small icon of an airplane might be used to represent the location of an airport, or a tree symbol might be used to represent a national park. This type of representation is common on tourist and thematic maps.

The correct answer is Normal lapse rate  

Important Points

• The existence of permanent snow caps on high mountains even in the tropics can be explained by the concept of "4) Normal lapse rate."
• The normal lapse rate, as described in the passage, is the rate at which temperature decreases with an increase in altitude.
• In the troposphere (the lowest part of Earth's atmosphere), the temperature decreases at an average rate of about 6°C per km.
• This means that even in the tropics, where temperatures at sea level are warm, high mountain peaks can be cold enough to maintain permanent snow caps.
• This is because as you ascend the mountain, the temperature decreases due to the normal lapse rate.

The other types of inversions (drainage, radiation, and subsidence) involve specific circumstances where temperature actually increases with height, which would not explain the presence of permanent snow caps.

The correct answer is Movement of warm air over a cold surface. 

Important Points

• According to the passage, advectional inversion is defined as the following:
• "Advection of warm air over a cold surface creates an inversion in the lower layers of the air mass as the warm air is cooled by conduction."

Therefore, "2) Movement of warm air over a cold surface" represents advectional inversion. This can occur when warmer air moves (or is advected) over a cooler body of water or land, causing the air nearest the surface to be cooled, while the air higher up retains its warmer temperature, creating an inversion.

The correct answer is Frontal inversion and subsidence inversion 

Important PointsThe passage specifically mentions that "Frontal inversions are not confined to the lower layers of the troposphere.

• They may form at upper levels wherever cold air underruns warm air or warm air advances above cold air."
• In addition, it states "subsidence inversion forms in an air mass when a large body of air subsides and spreads out above a lower layer... Inversions of this type may develop at considerable altitudes."

Therefore, the correct answer is "3) Frontal inversion and subsidence inversion" as these are not confined to the lower parts of the troposphere according to the provided text.

The correct answer is Ridge-side gentle slopes 

Important Points

• In the provided passage, it is mentioned that "Air drainage inversions are frequently associated with spring frosts in middle latitudes, and for this reason fruit growers prefer gentle slopes to valley bottoms for orchard sites."

So, based on the passage, the preferred orchard sites in the middle latitudes are "2) Ridge-side gentle slopes".

• An inversion layer can trap cold air in the valley bottoms, particularly during the night and in the early morning when the ground rapidly loses heat to the atmosphere through radiation.
• This phenomenon is known as air drainage inversion.
• The cold, dense air flows down from the hilltops and collects in the valley bottoms, similar to how water would flow. This leads to colder temperatures at the bottom of the valleys.

The correct answer is Short nights 

Important Points

• The passage states: "Inversions due to radiational cooling (radiation inversions) develop best in calm air under clear skies over flat terrain."
• It does not directly mention anything about the length of the night.
• However, it's known that longer nights, particularly those in the winter season, allow more time for the earth's surface to cool by radiating heat out into space.
• This is particularly true when the sky is clear, as clouds can act like a blanket, trapping heat and preventing it from escaping.

Therefore, based on the passage and additional understanding, the condition that is NOT ideal for radiation inversion is "1) Short nights".

The correct answer is A - II, B - IV, C - I, D - III

Important Points

The long-term objective of the National Population Policy (2000) of India was to achieve population stabilization by the year: 2045

Important PointsThe National Population Policy of India, established in 2000, set a goal of stabilizing the country's population by the year 2045, at a level consistent with the requirements of sustainable economic growth, social development, and environmental protection.

The National Population Policy (NPP) 2000 was a comprehensive policy introduced by the Government of India with the long-term objective of achieving a stable population by 2045.

• The policy had several immediate objectives such as addressing the unmet needs for contraception, healthcare infrastructure, and health personnel, and to provide integrated service delivery for basic reproductive and child health care.
• The goal of population stabilization aimed to achieve a total fertility rate (TFR) of 2.1, which is the fertility rate at which a population naturally replaces itself from one generation to the next, without migration.
• This figure is considered to be the replacement-level fertility, which can lead to a stable population in the long run.

The policy also emphasized other related health objectives, such as reducing infant mortality rate, maternal mortality ratio, and promoting the delayed marriage for girls, not before age 18 and preferably after 20 years of age.

• By setting a target date of 2045, the policy recognized that population stabilization would take time to achieve due to the demographic momentum where even as fertility rates decline, the total population continues to grow due to the large base of young people.
• This momentum is a result of past high fertility which results in a large number of young individuals entering their reproductive years.
• Moreover, there are regional disparities with some states achieving replacement-level fertility, while others have high fertility rates.
• Policies and programs that emphasize women's education, healthcare access, family planning services, and socio-economic development are crucial in achieving the goal of population stabilization.

The correct answer is: Pleistocene period 

Important Points 

The last Ice Age on Earth took place during the  Pleistocene  period, which lasted from about 2.6 million years ago to around 11,700 years ago. This period was characterized by multiple glacial and interglacial cycles, with significant ice sheets covering large parts of the continents.

Pleistocene Period:

• The Pleistocene epoch is a geological period that spanned from about 2.6 million years ago to approximately 11,700 years ago.
• It is often referred to as the "Ice Age" because of the extensive glaciations and ice sheets that covered significant portions of the Earth's surface during this time.
• The Pleistocene is known for its alternating periods of colder glacial periods and warmer interglacial periods.

​

The correct answer is : Arunachal Pradesh.

Kumjawng Pass is located in the state of Arunachal Pradesh, India.

Important Points

Kumjawng Pass is a geographical feature located in the northeastern region of India. 

• It is situated in the state of Arunachal Pradesh, which is known for its diverse topography, rich biodiversity, and strategic location.
• Arunachal Pradesh shares its borders with several countries, including Bhutan to the west, China (Tibet) to the north, and Myanmar to the east.
• Kumjawng Pass is particularly significant due to its proximity to the international borders and its potential role in connectivity between India and neighboring countries.
• The region also holds strategic importance for India due to its proximity to sensitive international boundaries.

In summary, Kumjawng Pass is located in the state of Arunachal Pradesh, which shares borders with Bhutan, China, and Myanmar. The pass holds geographical and strategic significance, given its location near international boundaries and its role in regional connectivity.

The correct match is  : A - II, B - III, C - I, D - IV.

Important PointsThe mixing of warm and cold currents helps to replenish the oxygen and favor the growth of planktons, the primary food for the fish population.

• The best fishing grounds of the world exist mainly in these mixing zones.

Additional Information

The correct answer is Arcuate Delta 

Important PointsGanga and Brahmaputra form the world’s largest delta.

• It is an arcuate-shaped delta.
• It is 400 km in length.
• The delta is made up of a web of distributaries and islands.
• It is covered by dense forests called Sundarbans.
• The major portion of the delta is a swamp and covered by marine water during high tide

Additional Information

The correct answer is 'A, B, D, C'

Key Points

• Uttar Pradesh (A):
• As per the Census of India 2011, Uttar Pradesh recorded one of the lowest sex ratios among Indian states, with a ratio of 912 females per 1,000 males.
• The state's low sex ratio can be attributed to socio-cultural factors such as preference for male children and poor female child healthcare.
• Maharashtra (B):
• Maharashtra has a relatively higher sex ratio than Uttar Pradesh, with a ratio of 925 females per 1,000 males in 2011.
• The state has made improvements in healthcare, education, and women's welfare, contributing to a more balanced sex ratio.
• Himachal Pradesh (D):
• Himachal Pradesh has a relatively higher sex ratio of 972 females per 1,000 males in 2011.
• The state has a tradition of gender equality, higher literacy rates, and better female healthcare, helping improve its sex ratio.
• Karnataka (C):
• Karnataka has the highest sex ratio among these states, standing at 973 females per 1,000 males in the 2011 census.
• The state's progressive policies, education, and healthcare improvements have led to a better sex ratio compared to other states.

Additional Information

• Sex Ratio in India: The overall sex ratio in India, as per Census 2011, was 940 females per 1,000 males. While some states have seen improvements, others, especially in the northern and central parts of India, continue to struggle with skewed sex ratios due to gender biases and social factors.
• Sex Ratio Trends: States like Kerala and Tamil Nadu have relatively better sex ratios due to factors like higher female literacy, better healthcare facilities, and social awareness, whereas states like Haryana and Uttar Pradesh have lower ratios due to deep-rooted gender inequalities.

The largest number of tribal population in India as per the 2011 Census is found in Madhya Pradesh.

Key Points

Madhya Pradesh has the largest Tribal population. It has more than 1.6 crore Schedule Tribe population who is 21% of the state population according to the 2011 census.

• The largest population in Madhya Pradesh is that of the Bhil tribe.
• The second highest tribal population is that of Odisha.
• The population of Mizoram in 2001 Census has been 888,573. Of them, 839,310 are Scheduled Tribes (STs) constituting 94.5 percent of the total population of the state.
• As per the Scheduled Tribes, Census of India 2001, Mizoram has 839,310 Scheduled Tribes (STs) constituting 94.5 percent of the total population of the state at that time.
• Nagaland is the highest percentage of the tribal population out of the total population of the state after Mizoram.

So, the correct answer is option 2) "Madhya Pradesh."

Additional Information

• Census is an official enumeration of the population from time to time.
• Census has been conducted every 10 years by the Registrar General and Census Commissioner of India under the Ministry of Home Affairs.
• The 16^th Indian census will be taken in 2021.
• In September 2019, Union Home Minister Amit Shah had stated that the 2021 national census would be held fully digitally through a mobile phone application.
• In February 2021, Union Finance Minister Nirmala Sitharaman confirmed in her budget speech that the 2021 census will be the first-ever digital census in India.
• 2021 Census will be carried out in 16 languages.
• The 15^th Indian Census was taken in 2011.
• India is the second most populated country in the world.
• The population in India is 139 crores.
• India has 17.7% of the world's population.
• The population density in India is  382 per km2.
• The first Census in India was conducted by the Viceroy - Lord Mayo (1872).
• The first official Census in India was conducted by the Viceroy - Lord Rippon (1881).

Important Points

• The state with the largest tribal population in India - Madhya Pradesh.
• The Union Territory with the largest tribal population in India - Daman and Diu.
• The Union Territory with the largest tribal population in percentage - Lakshadweep.
• Most populous state in India - Uttar Pradesh.
• Least populous state in India - Sikkim.
• Most populous Union Territory - Delhi.
• Least populous Union Territory - Lakshadweep.
• The state with the highest population growth rate - Meghalaya.
• The state with the lowest population growth rate - Nagaland.

The South Central Highland region in India is often associated with the Vindhya Range and areas around it. The Narmada Valley is also closely related to this region, being located to the south of the Vindhya Range.

So, the correct option among those provided is:

B and D only (Vindhya Scarplands and Narmada Valley)

Important PointsBundelkhand Upland:

• Bundelkhand is a geographical and cultural region in the Indian states of Uttar Pradesh and Madhya Pradesh.
• It is characterized by hilly terrain and is not directly a part of the South Central Highland region.

Vindhya Scarplands:

• The Vindhya Range runs across central India and separates the Indian subcontinent's northern and southern parts.
• The Vindhyas have been historically significant in forming the northern boundary for many southern Indian kingdoms.
• They are also considered the traditional boundary between North India and South India.
• The Vindhya Scarplands are associated with the South Central Highland region.

Rohilkhand Plains:

• Rohilkhand is a region in the northwestern part of Uttar Pradesh, India.
• It is part of the upper Gangetic Plain and does not have any direct connection with the South Central Highland region.

Narmada Valley:

• The Narmada River flows through the rift valley, lying between the Vindhya and Satpura ranges, which run parallel to each other in central India.
• The Narmada Valley is an important region, particularly in Madhya Pradesh and Gujarat.
• It is south of the Vindhya Range and associated with the South Central Highland region.

So, given this information, the correct pairing of regions directly associated with the South Central Highland would still be:

B and D only (Vindhya Scarplands and Narmada Valley)

These two regions are geographically linked to the South Central Highland region in central India, while the other options mentioned are not directly part of this region.

The correct answer is: C, B, A, D

Key Points

• Normal Distribution Basics:
• It is symmetric about the mean, with the highest frequency occurring at the mean score.
• The frequency decreases as we move away from the mean in either direction.
• The total area under the normal curve equals 1, representing total probability or total frequency.
• Interpretation of Intervals Relative to the Mean (40):
• C (30 to X̅): This interval ranges from 30 up to the mean 40, covering a 10-unit range just below the mean. Since it is close to the mean, it contains relatively high frequency.
• B (X̅ to 55): This interval goes from 40 to 55, covering 15 units just above the mean. It contains slightly less frequency compared to C, as it moves further from the mean.
• A (30 to 50): This interval spans from 30 to 50, covering 20 units around the mean, including parts below and above it. It includes frequencies from both sides of the mean, thus has a moderate total frequency.
• D (10 to X̅): This is the largest interval extending farthest below the mean (10 to 40), covering 30 units. However, since it stretches further away from the mean, the average frequency per unit is lower, and the overall frequency is less concentrated.
• Frequency Ordering Logic:
• The highest frequencies are near the mean; intervals closer to the mean have higher frequency densities.
• Intervals extending farther from the mean have lower frequency densities due to the shape of the normal curve.
• Therefore, among the given intervals, the one closest and smallest around the mean (30 to 40) has the highest frequency, and the widest interval extending farthest (10 to 40) has the lowest.

Additional Information

• In a normal distribution, approximately 68% of data lies within one standard deviation from the mean. Although the standard deviation is not given, the frequency concept still follows the proximity principle: scores nearer the mean have higher occurrence.
• Interval C (30 to 40) is closest to the mean on the lower side and therefore will contain the highest frequency among the intervals listed.
• Interval B (40 to 55) moves away from the mean but still within a moderate range, so frequency is somewhat less than C but more than the larger intervals.
• Interval A (30 to 50) includes parts of both sides of the mean but is broader and thus has a moderate frequency, less than intervals closer to the mean.
• Interval D (10 to 40), despite being large, extends farthest from the mean, where frequencies tail off, resulting in the lowest frequency of all intervals.
• Thus, ordering frequencies in ascending order as C, B, A, D aligns with the characteristics of the normal distribution curve.

The correct answer is Eolian cycle .

Important PointsThe Eolian cycle of erosion refers to the processes of erosion, transport, and deposition by the wind.

• This is typically prominent in arid and semi-arid environments, where the lack of vegetation cover and moisture allows the wind to play a more significant role in shaping the landscape.
• Pediplains and inselbergs are indeed common features of arid or semi-arid environments where the Eolian cycle is dominant.

A pediplain is a broad, almost flat, erosion surface that has been created by the coalescence of pediments (gentle, sloping surfaces at the base of mountains) in an arid or semi-arid region.

• The process begins with weathering of the parent rock, followed by erosion and transportation by wind and occasional water flows, and finally, deposition in lower areas.
• This cycle is repeated over a long period of geological time, eventually forming a flat or gently undulating pediplain.
• An inselberg, on the other hand, is an isolated hill or mountain that rises abruptly from the pediplain.
• They are considered 'relict' features, meaning they are remnants of previous landscapes and have been left behind as the surrounding landscape eroded away.
• The term "inselberg" literally translates as "island mountain".
• These features are usually composed of more resistant rock types that can withstand the erosive processes better than the surrounding rocks.
• The development of pediplains and inselbergs can be attributed to the Eolian cycle because, in these arid or semi-arid climates, wind plays a significant role in erosion and deposition.
• However, it's important to note that these landforms can also be influenced by other erosional processes, like fluvial processes, and their formation is controlled not only by climatic conditions but also by the geological structure and composition of the rocks in the area.

The correct answer is Equatorial region .

Important Points

The density of seawater is influenced by its temperature, salinity (the amount of dissolved salts), and pressure. Warmer water is less dense than cooler water, and fresher water is less dense than saltier water.

• Given these factors, the density of oceanic water is generally lowest in the "1) Equatorial region."
• This is because the waters in the equatorial region are typically warmer due to high insolation (incoming solar radiation), and warm water has a lower density than cold water.
• Additionally, high levels of precipitation in equatorial regions can lower the salinity of the surface water, further reducing its density.
• By contrast, water in the polar regions is colder and thus denser.
• The high evaporation rates in the sub-tropical regions increase the salinity and density of the water there.
• While temperate regions have moderate densities due to their intermediate temperatures and salinity levels.

Additional Information

• Comparatively, in Polar regions, the cold temperatures result in very dense water.
• In some areas, sea ice formation can further increase the density of the surrounding seawater: as sea ice forms, it mainly incorporates pure water in the ice, leaving behind the salts, which increases the salinity and thus the density of the remaining seawater.

In the Sub-tropical region, the combination of high evaporation, low precipitation, and warm

• but not as high temperatures as the Equator results in increased salinity and thus slightly higher density compared to the Equatorial region.

Temperate regions have more moderate temperatures and salinity levels,

• and thus have densities that are intermediate between tropical and polar regions.

Thus, while all these factors play a role in the density of seawater across the globe, the Equatorial region, with its warm temperatures and high rainfall, generally has the least dense oceanic water.

The correct answer is Meghalaya.

Key Points

• The representative parts of natural and cultural landscapes extending over large areas of terrestrial or coastal/ marine ecosystems or a combination of both designated by the United Nations Educational, Scientific and Cultural Organisation (UNESCO)  is called a Biosphere Reserve.

Additional Information 

Image of Nokrek Biosphere Reserve:

The correct answer from the options given is: D, B, A, C

Important PointsGamma Rays (D):

• Gamma rays have the shortest wavelengths and the highest frequencies in the electromagnetic spectrum.
• They are produced by the hottest and most energetic objects in the universe, such as neutron stars and pulsars, supernova explosions, and areas around black holes.
• On Earth, gamma rays are generated in nuclear explosions and in laboratories.

Ultraviolet (B):

• Ultraviolet light has a shorter wavelength than visible light but longer than gamma rays.
• The sun emits ultraviolet light, but most of it is absorbed by the Earth's atmosphere, protecting us from its harmful effects. However, some of it does reach the surface and can cause sunburn.

Infrared (A):

• Infrared radiation has a wavelength longer than visible light but shorter than microwaves. We can feel infrared radiation as heat.
• It's emitted by anything that's warmer than absolute zero (-273.15 Celsius), including the human body and objects around us.

Microwaves (C):

• Microwaves have the longest wavelengths among the four options.
• They're used in various applications like communications (including cell phones and WiFi), radar, and of course, microwave ovens
• . In the electromagnetic spectrum, they sit between radio waves (which have even longer wavelengths) and infrared radiation.

The correct answer is A and C only .

Important Point

A. Both variables have come from the normally distributed population:

• This is true.
• Pearson's correlation assumes that each of the two variables it is comparing are normally distributed.

B. rxy is a non-parametric measure of the relationship:

• This is false.
• Pearson's correlation is a parametric measure.

C. It is known as the covariance of the two variables:

• This is not entirely correct.
• While Pearson's correlation does involve covariance in its calculation (it's the covariance of the two variables divided by the product of their standard deviations), it is not the same as covariance.

D. It is highly suitable to measure relationship of attributes like 'preferences' 'efficiency' and 'intelligence':

• This statement can be misleading.
• While Pearson's correlation can be used to measure the relationship between two variables, the variables need to be interval or ratio measurements and linearly related. 'Preferences', 'efficiency', and 'intelligence' may not always meet these criteria, depending on how they are measured.

So, while this is a bit of a complex question and none of the answers fit perfectly, option 3 (A and C only) is the best fit among the given choices.

The correct chronological order is Option 3: D, B, C, A.

Key Points

• The correct chronological order for the given events is D, B, C, A. The Montreal Protocol (1987) aimed to phase out ozone-depleting substances, while the Earth Summit (1992) focused on sustainable development, climate change, and biodiversity.
• The World Summit on Sustainable Development (2002) aimed to review progress since the Earth Summit and discussed sustainable development goals and strategies. Finally, the Conference of Parties (CoP-21) in 2015 produced the landmark Paris Agreement to combat climate change, with nations committing to limiting global temperature rise.

 Montreal Protocol (1987):

• Addressed ozone layer depletion.
• Aimed to phase out ozone-depleting substances.
• Vital for protecting Earth's ozone layer.

 Earth Summit (1992):

• Officially United Nations Conference on Environment and Development (UNCED).
• Focused on sustainable development, climate change, and biodiversity.
• Resulted in the adoption of Agenda 21 and the Framework Convention on Climate Change.

World Summit on Sustainable Development (2002):

• Also known as Rio+10.
• Aimed to review progress since the Earth Summit.
• Discussed sustainable development goals and strategies.

Conference of Parties (CoP-21) (2015):

• The 21^st Conference of the Parties (CoP-21) to the UNFCCC.
• Produced the landmark Paris Agreement to combat climate change.
• Nations committed to limiting global temperature rise.

The correct chronological order is Option 3: D, B, C, A.

The correct answer is Canada

Important Points

In Canada, farming is severely restricted by climate, particularly in northern regions where the cold climate and short growing season limit agricultural activities. The harsh winter conditions and shorter growing periods make agriculture challenging in many parts of the country. 

Challenges of Canadian Climate for Farming:

Cold Climate:

• ​ Much of Canada experiences cold temperatures for a significant portion of the year. This limits the growing season for crops.

Short Growing Season:

• ​The short frost-free period restricts the types of crops that can be grown. Some crops that require a longer growing period, like certain varieties of grains and fruits, struggle to mature before the first frost.

Extreme Winter Conditions:

• Winters in Canada can be harsh, with freezing temperatures, heavy snowfall, and icy conditions. These conditions can damage crops and disrupt farming activities.

Permafrost:

• In northern regions, permafrost (permanently frozen ground) poses challenges to agriculture. It restricts the depth of root growth and limits the types of crops that can be cultivated.

Topography:

• The varied and rugged topography of Canada also affects agriculture. Mountainous regions and steep terrain can limit suitable areas for cultivation.

the correct answer is  D.M. Smith.

Important Points

The idea/concept of 'spatial margins of profitability’ in the context of industrial location theories was propounded by D.M. Smith. 

Theory of Industrial Location by D. M. Smith:

• D. M. Smith presented a simple model of industrial location in his book “Industrial Location”, published in 1971.
• His model was based on his studies of Steel Mill in Brazil.
• The theory explains the idea of spatial margin locations.
• Location inside the margin would result in profit for the organization, while outside would result in loss.
• The theory is based on Spatial Margins of profitability of an industry, so it is known as 'Spatial MarginsTheory’.
• His theory is also known as the ‘Area-Cost Curve Theory’.

​ Therefore,The idea/concept of 'spatial margins of profitability’ in the context of industrial location theories was propounded by D.M. Smith. 

Additional Information

Area-Cost Curve Theory:​

• According to him, manufacturing costs vary in different situations and locations, so that the revenues and profits will vary within the feasible margins.
• Smith attempted to explain his theory by setting locational flexibility within a spatial range as delimited by the intersection of space cost curves and space revenue curves.
• This can be explained with the help of a graphic presentation.
• In the figure, the x-axis shows that the distance increasing from left to right, and the y-axis denotes the number of costs and revenues.
• Cost is indicated by the downward line and revenue is shown by the upward line in the image above.
• At two points the quantity of cost and revenue will be equal, A and D.
• The area between A to D is profitable for the industry.
• The point 'B' showing the highest revenue while the line joining 'B' passes through the lower cost point. The range is maximum in this location.

It is clearly depicted that the space-revenue curve would be 'A-shaped' in D. M. Smith's theoretical model of the spatial margins to profitability.

The correct chronological order of Greek scholars is:

Key Points

• Hecataeus (circa 6^th century BCE)
• Eratosthenes (circa 3^rd century BCE)
• Hipparchus (circa 2^nd century BCE)
• Posidonius (circa 1^st century BCE)

So, the correct order is option 1) "C, A, D, B."

Important Points Hecataeus (circa 6^th century BCE):

• Hecataeus of Miletus is considered one of the earliest Greek geographers and historians.
• He created one of the first known maps of the known world and is known for his work "Ges Periodos" or "Description of the Earth."
• Hecataeus' work laid the foundation for later Greek and Roman geographers by introducing the concept of dividing the world into regions.

Eratosthenes (circa 3^rd century BCE):

• Eratosthenes, known as the "Father of Geography," made significant contributions to the measurement of the Earth's circumference.
• He calculated the Earth's circumference with remarkable accuracy using the angle of the Sun's rays at different locations.

Hipparchus (circa 2^nd century BCE):

• Hipparchus was a Greek astronomer and geographer known for his contributions to astronomy and geography.
• He cataloged stars and made significant advancements in the understanding of celestial movements.
• In geography, Hipparchus made observations related to latitude and longitude, improving the precision of geographic coordinates.

Posidonius (circa 1^st century BCE):

• Posidonius was a Greek philosopher, astronomer, and geographer.
• He contributed to the fields of astronomy, geography, and meteorology.
• Posidonius' works included discussions on the Earth's climate zones and the influence of geography on human societies.

The term "Carbon Sinks" refers to anything that absorbs more carbon dioxide (and sometimes other greenhouse gases) than it releases. Carbon sinks help in the removal of carbon dioxide from the atmosphere, thus mitigating climate change.

Important Points

Forests are a primary example of carbon sinks, as they absorb carbon dioxide during photosynthesis, a process by which green plants and trees convert sunlight into energy.

So, the correct answer is: for forests

• Forests act as carbon sinks because trees and other plants absorb carbon dioxide from the atmosphere during photosynthesis, a process that converts sunlight into energy.
• This stored carbon dioxide contributes to the mass of the tree, helping it grow.
• Therefore, forests play a crucial role in mitigating climate change by absorbing a substantial amount of the carbon dioxide that human activities release into the atmosphere.