Question 1

The major motion of the planet earth includes

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both (a) and (b)

Question 2

The most obvious effect of pressure on rocks is

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the reorientation of mineral crystals

Question 3

The major countries of Middle East are

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All of the above.

Question 4

The major pedogenic process acting on soils at the macro scale are

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All of the above

Question 5

The most recent and logical concept regarding the origin of ocean basins and continents is that of

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continental data

Question 6

The main period of Mesozoic era include

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Triassic period, Jurassic period and cretaceous period

Question 7

The mean distance of the earth from the sun is approximately

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149,502,000 km

Question 8

The lowermost and the oldest epoch of the Tertiary Period of geologic time is

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Palaeocene

Question 9

The low heating capacity of which of the types of coal reduces its value as an industrial fuel?

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Peat

Question 10

Fluvial Geomorphology – Drainage Basin Laws “The mean basin area of successive stream orders forms a linear relationship when graphed (on appropriate axes).” This statement refers to:

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Introduction / Context:Quantitative geomorphology uses empirical “laws” to describe how properties of stream networks change with order (Strahler or Horton ordering). One such observation is that certain variables, such as mean basin area, change systematically from one stream order to the next and plot as straight lines on logarithmic or semi-logarithmic graphs.Given Data / Assumptions:Variable of interest: mean basin area for each stream order.Observation: a linear trend appears when graphed (commonly on log scales).We must identify the named empirical relationship.Concept / Approach:Horton’s and subsequent stream-order laws include the law of basin areas, which states that mean basin area increases geometrically with stream order. When plotted as log(mean area) versus order, a linear relationship emerges. Other named laws include the law of stream numbers (geometric decrease with order) and the law of stream lengths (geometric increase). “Morphometric analysis” is a general term for the field, not this specific relationship.Step-by-Step Solution:Recognize the variable: mean basin area per order.Recall Horton/Strahler empirical laws: mean area increases geometrically with order.Linear plot on log scale → signature of a geometric progression.Identify the specific name: “law of basin areas.”Verification / Alternative check:In many drainage basins worldwide, plotting log(mean basin area) against stream order yields straight lines whose slope reflects the area ratio between orders. This consistent behavior supports the named law.Why Other Options Are Wrong:Morph metric analysis: Broad methodology; not a specific law.Law of drainage composition: Not the standard name for this relationship.None of the above: Incorrect because the law has a recognized name.Common Pitfalls:Confusing the three principal Horton laws (numbers, lengths, areas). Remember: numbers decrease with order; lengths and areas increase with order; the “area” version is the law of basin areas.Final Answer:law of basin areas

Question 11

World Geography — Lowest Point on Land (Free Surface) Choose the correct location that represents the Earth's lowest point on land (natural free surface above underlying bedrock), measured relative to mean sea level.

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Introduction / Context:The “lowest point on land” usually refers to the lowest natural free surface (not inside a cave or mine) relative to mean sea level. This is a classic physical-geography fact tested in competitive exams. Several depressions are below sea level, but only one holds the record globally when measured as a natural open surface accessible from land.Given Data / Assumptions:We compare well-known below-sea-level depressions: Dead Sea shores, Death Valley, Caspian depression, and Lake Eyre.Interpret “on land” as an exposed natural surface, not ocean floor or man-made excavation.Standard reference is mean sea level (MSL).Concept / Approach:The shorelines around the Dead Sea (Jordan/Israel) form the Earth’s lowest exposed land elevation, over 400 m below MSL. Other locations are also below MSL but not as low: Death Valley’s Badwater Basin is about 86 m below MSL; Lake Eyre (Kati Thanda) is roughly 15 m below MSL; the Caspian Sea surface is about 28 m below MSL (and it is a water surface of an inland sea). Hence, the Dead Sea margin is the lowest exposed point on land.Step-by-Step Solution:Identify candidate with the greatest negative elevation relative to MSL.Recall typical values: Dead Sea ~ −430 m; Death Valley ~ −86 m; Caspian Sea ~ −28 m; Lake Eyre ~ −15 m (variable).Select the location with the most extreme depression: Dead Sea shores.Verification / Alternative check:Multiple atlases and geography compendia list the Dead Sea coastline as the lowest land elevation, with minor year-to-year variation due to evaporation and inflows, but always far lower than other options.Why Other Options Are Wrong:Death Valley, USA: Deep but only about −86 m; not the lowest.Caspian Sea, Russia: Inland sea surface around −28 m; far higher than the Dead Sea depression.Lake Eyre, Australia: Typically around −15 m; varies with flooding but not near the record.Common Pitfalls:Confusing “lowest point on Earth” with oceanic trenches (e.g., Challenger Deep) which are submarine, not “on land.” Also, ignoring that the Caspian is a water surface and much less depressed than the Dead Sea basin.Final Answer:Dead Sea, Jordan/Israel

Question 12

World Geography — Standard Reference Lines The great circle of longitude that passes through London (Greenwich) is called the ______.

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Introduction / Context:Map reading and timekeeping depend on globally agreed reference lines. The line of 0° longitude that passes through the Royal Observatory at Greenwich, London, is the internationally recognized starting point for measuring longitudes east and west and for defining time zones (Greenwich Mean Time/UTC offsets).Given Data / Assumptions:The meridian in question goes through London (Greenwich).We need the correct geographical term, not latitude lines.Answer should name both the conventional term and its numeric value.Concept / Approach:Lines of longitude (meridians) run north–south; lines of latitude (parallels) run east–west. The only meridian singled out as the global zero reference is the Prime Meridian at 0°. The Equator, Tropic of Cancer, and Tropic of Capricorn are latitudes, not meridians, and therefore cannot pass “through London” as a north–south reference line.Step-by-Step Solution:Identify that “meridian” means longitude.Recall the special meridian through Greenwich is 0° longitude.Select “Prime Meridian (0° longitude).”Verification / Alternative check:Check any standard atlas legend: it marks longitudes from 0° at Greenwich, confirming the name Prime Meridian.Why Other Options Are Wrong:Equator / Tropic of Cancer / Tropic of Capricorn: These are latitudes; they do not describe a meridian through London.Common Pitfalls:Mixing up latitudes and longitudes because both are shown as “lines” on globes; remember meridians converge at poles while parallels encircle the globe east–west.Final Answer:Prime Meridian (0° longitude)

Question 13

Earth Science — Size of the Magnetosphere (Dayside) Approximately how far does the Earth’s magnetosphere extend on the dayside, measured from the planet and commonly quoted in general geography references?

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Introduction / Context:The magnetosphere is the region dominated by Earth’s magnetic field, deflecting the solar wind. Its size is not fixed; it compresses on the dayside and stretches into a long magnetotail on the nightside. General-knowledge sources often quote a rounded dayside extent figure for quick recall in exams.Given Data / Assumptions:The question asks for a typical dayside extent in kilometers “above the Earth’s surface.”Rule-of-thumb distances are acceptable for GK (not a precise, variable boundary).We exclude tail distances, which are far larger.Concept / Approach:On the dayside, the magnetopause is commonly around 10 Earth radii (Re) from Earth’s center under average solar-wind pressure. One Re ≈ 6371 km. A rounded figure many primers present is ~64,000 km (order of 10 Re), acknowledging variability. Therefore, among the choices, ~64,000 km “above the surface” is the accepted school-level answer, despite the technical nuance that 10 Re is measured from the center (giving a slightly lower height above the surface).Step-by-Step Solution:Recall 1 Re ≈ 6371 km; 10 Re ≈ 63,710 km.Map to rounded GK figure ≈ 64,000 km.Select the nearest provided option.Verification / Alternative check:Introductory geoscience texts and exam guides typically cite “about 64,000 km on the dayside” and “hundreds of thousands of km into the tail on the nightside.”Why Other Options Are Wrong:9600 km / 8000 km: Far too small; within the plasmasphere and inner magnetosphere only.None of the above: Not needed since a suitable rounded value is present.Common Pitfalls:Confusing center-to-boundary distance (in Re) with height above surface; GK answers typically use a convenient round km figure without that distinction.Final Answer:64,000 km above the Earth's surface

Question 14

Water Resources — Objectives of Multi-Purpose River Projects Identify the most complete statement describing the core objectives served by India’s multi-purpose river-valley projects (e.g., Bhakra–Nangal, Damodar, Hirakud).

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Introduction / Context:Large river-valley projects in monsoon climates aim to smooth water availability across seasons and provide multiple co-benefits. This classic civics/geography question checks recognition that such projects are “multi-purpose,” not single-purpose, infrastructure investments.Given Data / Assumptions:Monsoon creates surplus in rainy season and scarcity in dry months.Major dams can deliver irrigation, power, flood moderation, and navigation improvements.Ancillary benefits may include fisheries, recreation, and regional development.Concept / Approach:“Multi-purpose” explicitly signals more than one objective. The listed goals—irrigation storage and release, hydropower generation, and flood control/navigation—are all canonical functions of such projects. Therefore, “All of the above” best captures the breadth of purposes served by these schemes in planning literature and exam keys.Step-by-Step Solution:Confirm each listed function is standard: irrigation ✓, hydropower ✓, flood control/navigation ✓.Since all are valid, choose the inclusive option.Verification / Alternative check:Project brochures and planning documents for Bhakra–Nangal, Damodar Valley Corporation, and Hirakud enumerate these very objectives, affirming the all-inclusive choice.Why Other Options Are Wrong:Any single item (a, b, or c) understates the “multi-purpose” nature.Common Pitfalls:Assuming “power” dominates; in agrarian economies, irrigation and flood attenuation are equally central.Final Answer:All of the above

Question 15

Policy & Governance — Scope of India’s Ministry of Water Resources Which option best summarizes the broad functions covered by the Ministry responsible for water resources development and regulation in India?

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Introduction / Context:Public administration questions often test the scope of central ministries. India’s water ministry (variously titled over time, e.g., Ministry of Jal Shakti components) handles planning, technical scrutiny, funding facilitation, legal/dispute processes, and resource policy including groundwater—hence a wide remit beyond just “dams.”Given Data / Assumptions:The options list discrete roles: policy/coordination, technical appraisal, and facilitation/legal functions.We assume a comprehensive, not piecemeal, mandate.Groundwater policy and interstate dispute mechanisms are integral in federal water governance.Concept / Approach:Because the ministry must steer policy, ensure technical quality of funded works, and manage interstate coordination and legal frameworks, each listed function is indeed part of its portfolio. Thus, the combined “All of the above” best represents the ministry’s comprehensive responsibilities as expected in exam outlines.Step-by-Step Solution:Check if each function is plausibly ministerial: policy ✓, appraisal ✓, facilitation/dispute/groundwater ✓.Select the inclusive answer reflecting full scope.Verification / Alternative check:Standard government handbooks and ministry charters enumerate these domains under water resources governance, confirming the inclusive choice.Why Other Options Are Wrong:Choosing only one would omit essential parts of the ministry's remit and thus be incomplete.Common Pitfalls:Equating water resources management only with surface-water projects; groundwater and interstate issues are critical too.Final Answer:All of the above

Question 16

Physical Geography — Salinity Extremes Among the following seas, which one is the most saline (highest average salinity) in the world?

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Introduction / Context:Salinity comparisons appear frequently in physical geography. While many small enclosed lakes are hypersaline, among the named seas in common GK, the Dead Sea (a salt lake bordered by Jordan and Israel/Palestine) is famous for its extremely high salinity that allows people to float effortlessly.Given Data / Assumptions:We compare regional seas: Red Sea, Dead Sea, Arabian Sea, Mediterranean Sea.Interpret “most salty sea” as the highest average salinity among options.Accept the well-established relative rankings used in GK texts.Concept / Approach:The Dead Sea’s salinity typically exceeds 30% by mass (varies by depth and season), far above oceanic averages (~3.5%) and above the Red Sea (~4% to >4% in places) or the Mediterranean (~3.8%). The Arabian Sea is essentially open ocean with typical marine salinity values. Thus, the Dead Sea is the most saline among the listed choices.Step-by-Step Solution:List each sea’s approximate salinity: Dead Sea ≫ Red Sea > Mediterranean ≈ Arabian Sea (open ocean).Select the extreme case: Dead Sea.Verification / Alternative check:Visual evidence of effortless floating and salt crusts at the Dead Sea shoreline is widely documented; scientific surveys confirm the extreme salinity compared to typical seas.Why Other Options Are Wrong:Red Sea / Mediterranean Sea: High for open seas but far below the Dead Sea's hypersalinity.Arabian Sea: Typical ocean salinity; not extreme.Common Pitfalls:Assuming “sea” excludes salt lakes; in GK usage, the Dead Sea is consistently accepted as the saltiest among commonly cited seas/lakes.Final Answer:Dead Sea

Question 17

Climatology — Steppe Biome Vegetation In regions with a classic steppe-type climate (semi-arid continental interiors), the predominant natural vegetation is best described as:

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Introduction / Context:Biomes and climate-vegetation relationships are staple topics in world geography. The “steppe” is associated with mid-latitude, semi-arid climates featuring low to moderate rainfall and high continentality, producing a characteristic vegetation structure distinct from forests and deserts.Given Data / Assumptions:Climate: semi-arid, pronounced seasonality, limited precipitation.Soils: often chernozem or chestnut in some regions.Vegetation: adapted to drought and temperature extremes.Concept / Approach:Steppes are dominated by grasses and herbaceous plants with few trees due to insufficient and variable rainfall. Trees, when present, are typically confined to river valleys or sheltered areas. Hence “large grasslands” best captures the physiognomy. Evergreen or coniferous forests require more dependable precipitation or different thermal regimes and are not typical of steppe cores.Step-by-Step Solution:Match climate to plant form: semi-arid → grass dominance.Reject forested options that imply higher year-round moisture.Select “large grasslands.”Verification / Alternative check:Examples include Eurasian steppes, North American prairies (drier margins), and Argentine pampas (in some classifications), all noted for expansive grass cover rather than closed-canopy forests.Why Other Options Are Wrong:Evergreen/deciduous/coniferous forests: Tree-dominated types; inconsistent with steppe rainfall regimes.Common Pitfalls:Confusing “savanna” (tropical grassland with scattered trees) with “steppe” (temperate grassland largely treeless).Final Answer:large grasslands

Question 18

Latitude Bands — Definition of Middle Latitudes Middle latitudes (also called temperate zones) extend approximately between which parallels in each hemisphere?

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Introduction / Context:Geographers divide Earth into latitude zones: low (tropics), middle (temperate), and high (polar). Knowing the boundaries is essential for climate patterns, wind belts, and daylight variations. The “middle latitudes” are neither tropical nor polar, sitting between the subtropical boundaries and the polar circles.Given Data / Assumptions:Tropics are bounded by 23.5° (Tropic of Cancer/Capricorn).Polar Circles occur at roughly 66.5° (Arctic/Antarctic Circles).Question asks for the band covering both hemispheres.Concept / Approach:By definition, middle latitudes lie between the Tropics (23.5°) and the Polar Circles (66.5°). This zone experiences pronounced seasonal changes and hosts the prevailing westerlies. Therefore, “23.5° and 66.5° in both the hemispheres” is the standard textbook demarcation. The other options either truncate the zone or misstate the boundaries.Step-by-Step Solution:Recall fixed parallels: Tropics at 23.5°, Polar Circles at 66.5°.Thus, middle latitudes = 23.5° to 66.5° N and S.Choose the option stating both bounds in both hemispheres.Verification / Alternative check:Introductory climatology texts and world-atlas diagrams use the same limits when describing temperate zones and wind belts.Why Other Options Are Wrong:23.5° N to 32.5° S: Asymmetric and too narrow.66° N to 66° S: Near polar circles but ignores the 23.5° boundary.North Pole to South Pole: Encompasses all latitudes; not specific.Common Pitfalls:Rounding 66.5° to 66° can misplace the boundary; the accepted value is approximately 66.5° because Earth’s axial tilt is ~23.5°.Final Answer:23.5° and 66.5° in both the hemispheres

Question 19

Space Weather — Magnetic Storm Development During which phase of a geomagnetic storm does the Earth’s magnetosphere typically become most disturbed/unstable in a sustained way?

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Introduction / Context:Geomagnetic storms evolve through recognizable phases associated with solar wind/IMF conditions. Understanding these phases helps explain disruptions to satellites, power grids, and navigation systems—an interdisciplinary topic spanning geophysics and space weather operations.Given Data / Assumptions:Phases often identified: sudden commencement (SSC), initial phase, main phase, and recovery phase.“Unstable” here refers to enhanced geomagnetic activity and strong ring-current development.We choose the phase with maximum sustained disturbance.Concept / Approach:After an SSC or initial compression, the main phase is characterized by southward interplanetary magnetic field coupling and enhanced magnetospheric convection, leading to ring-current intensification (Dst index decreases markedly). This sustained energy input produces the most severe, widespread disturbances—auroral expansions, magnetic fluctuations, and potential technological impacts. Thus, the magnetosphere is most “unstable” during the main phase, with recovery following thereafter.Step-by-Step Solution:Recognize SSC/initial phases as brief onset/compression events.Identify main phase as the interval of peak energy input and strongest Dst depression.Select “main phase.”Verification / Alternative check:Storm indices (Dst, Kp) typically peak in disturbance during the main phase; satellite observations show strongest ring-current development then, corroborating this choice.Why Other Options Are Wrong:initial phase / SSC: Mark onset or sudden compression, usually short-lived compared to the sustained disturbances of the main phase.None of the above: Not applicable because “main phase” matches standard storm morphology.Common Pitfalls:Equating the dramatic spike of an SSC with overall severity; the SSC is a sharp kick, but the main phase drives the lasting instability and technological risks.Final Answer:main phase

Question 20

Mineralogy — Sulphide Group Identification Which of the following minerals belong to the sulphide group of ores/minerals?

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Introduction / Context:Ore minerals are often classified by anion groups: oxides, sulphides, carbonates, etc. Recognizing common sulphides is essential for basic economic geology and metallurgy since many metals are extracted from their sulphide ores by roasting, smelting, and subsequent refining.Given Data / Assumptions:Cinnabar has the formula HgS (mercury sulphide).Pyrite is FeS2 (iron disulphide), nicknamed “fool’s gold.”Galena is PbS (lead sulphide), the principal ore of lead.Concept / Approach:Each listed mineral contains sulphur as the dominant anion in the crystal chemistry, placing them squarely in the sulphide class. Therefore, if all three are sulphides, the correct selection is the inclusive choice “All of the above.” This is a straightforward classification recall item.Step-by-Step Solution:Check formulae: HgS, FeS2, PbS → all sulphides.Since every option given is a sulphide, choose the inclusive answer.Verification / Alternative check:Introductory mineralogy tables list these as textbook sulphides and principal ores of their respective metals (mercury, iron byproduct, lead).Why Other Options Are Wrong:Any single mineral choice would be incomplete when all three belong to the same group.Common Pitfalls:Confusing pyrite (FeS2) with an oxide because of its metallic luster; luster does not determine anion class—composition does.Final Answer:All of the above

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