Mountains and Plateaus of India

Correct answer: A. Vindhyan system

The correct answer is the Vindhyan system. The Kaimur Range and Bhander Plateau are recognized as structural and physiographic units associated with the Vindhyan ranges and the central Indian plateau belt. They are formed in and around the extensive Vindhyan sedimentary region, which stretches across parts of central India and includes prominent escarpments and tablelands. The Nilgiri junction belongs to southern India, the Karakoram is a high mountain system of the far north, and Lakshadweep consists mainly of coral islands in the Arabian Sea. Their locations and geological settings do not fit the named features, so option A is the only suitable association.

Correct answer: A. They show old mineral-rich terrains of Peninsular India

Option A is correct because the Dharwar and Singhbhum regions represent ancient hard-rock terrains of Peninsular India and are closely associated with mineral resources. Their rocks formed during very early geological periods and have undergone long erosion, weathering, and tectonic changes. The exposed crystalline basement and related formations help explain the occurrence of iron ore, manganese, gold, copper, and other minerals in parts of these regions. They are not coral islands, young alluvial plains, or outer Himalayan ranges. Thus their geographical significance lies in showing the old geological foundation and mineral wealth of the peninsular block.

Correct answer: A. Deccan Plateau and western peninsular region

The correct answer is the Deccan Plateau and western peninsular region. The Balaghat and Harishchandra ranges are associated with the elevated, dissected highlands of the Deccan, particularly the Maharashtra and adjoining western peninsular landscape. Their relief consists of uplands and hill ranges rather than young folded Himalayan mountains or low depositional plains. The Garo Hills belong to the Meghalaya plateau in northeastern India, while the Ganga-Brahmaputra delta is a low, sediment-built coastal plain. Studying these ranges in the Deccan context helps explain the regional relief, drainage divides, basaltic uplands, and plateau character of western peninsular India.

Correct answer: A. Varied altitude and moisture create different habitats

Option A is correct. The Western Ghats have substantial variation in elevation, slope, aspect, and local rainfall. Moist winds from the Arabian Sea rise along the escarpment, producing heavy rain on windward slopes, while rain-shadow areas are comparatively drier. Changes in altitude and moisture create forests, shola grasslands, montane habitats, moist valleys, and drier transitional ecosystems within a relatively short distance. This environmental variety supports high species richness and many endemic plants and animals. Sandy plains, extensive glaciers, and coral reefs do not result from the ordinary relief-rainfall relationship of the Western Ghats.

Correct answer: A. The impact of cold Central Asian winds is reduced

The governing concept is the climatic-barrier role of the Himalayas. Their great height and nearly continuous west-to-east alignment obstruct the southward movement of extremely cold continental air masses from Central Asia during winter. As a result, northern India is protected from the full severity of those winds, while the mountains also help retain monsoon moisture and encourage rainfall on their southern slopes. Therefore, option A is correct. The formation of marine corals in the Deccan is unrelated to the Himalayan barrier; the Eastern Ghats do not join the Himalayas; and the old Aravalli range is not transformed into a young fold range by this climatic effect.

Correct answer: A. Steep mountain edge

The governing geographical idea is the relationship between a plateau and its bordering escarpment or mountain edge. The Western Ghats rise along the western margin of the Deccan Plateau and generally form a high, steep relief wall facing the Arabian Sea. Their elevation and relatively continuous alignment make the western edge much more abrupt than many parts of the eastern plateau margin. Thus option A, steep mountain edge, best describes the relief form. A marine coral lagoon is a coastal depositional feature, not the landform represented here. The Ganga alluvial plain is built by river sediments in northern India, while a Himalayan glacier is an ice body at high elevation and has no connection with this Deccan location.

Correct answer: A. Monsoon rainfall barrier effect on western coast

The governing concept is orographic rainfall caused by a mountain barrier. The Western Ghats run for a long, comparatively unbroken distance close to the Arabian Sea coast. Moist south-west monsoon winds are forced to rise when they meet this elevated wall. Rising air cools, condenses and produces heavy rainfall on the windward western slopes, while descending air on the eastern side is comparatively drier. Their greater continuity makes this barrier effect stronger than the generally discontinuous Eastern Ghats. Therefore option A is correct. Ganga delta formation depends on river deposition, Thar expansion depends on aridity and regional processes, and coral formation in Ladakh is geographically and environmentally impossible.

Correct answer: A. Both are Ghats-related hill parts of South India

The governing concept is regional classification and physical connection among the hill groups of peninsular India. The Nilgiri Hills occupy the meeting area of the Western and Eastern Ghats, while the Anamalai Hills form an important highland group south of the Palghat Gap and are associated with the Western Ghats system. Their location, relief and geological setting therefore place both in the Ghats-related highlands of southern India. Option A is the correct broad conclusion. They are not outer Himalayan ranges because they lie in the Peninsular Plateau; they are not sandy dunes of the Thar Desert; and they are not parts of the Ganga Delta, which is a low alluvial depositional region.

Correct answer: A. Himalayas are linked with compression and Deccan with lava flows

The governing concept is contrasting geological origin. The Himalayas are young fold mountains produced mainly by the convergence of the Indian and Eurasian plates. Compression folded and uplifted former sediments along the plate boundary. The Deccan Plateau, in contrast, is a broad ancient volcanic tableland whose basaltic layers were formed largely by extensive lava flows, especially during the Deccan volcanic episode. Thus option A correctly contrasts compression-related mountain building with lava-related plateau formation. Option B reverses the evidence and assigns unrelated coral and glacial origins. Option C confuses major landform categories, while option D incorrectly identifies the Himalayas and Deccan with unrelated ranges.

Correct answer: A. Ladakh Plateau

The governing concept is the identification of a physiographic region from its climate and elevation. The Ladakh Plateau lies in the Trans-Himalayan zone at very high altitude. It is a cold desert because low temperatures limit evaporation and vegetation, while the surrounding mountain ranges block much of the south-west monsoon. This rain-shadow position produces very low precipitation and dry landscapes. Therefore option A is correct. The Meghalaya Plateau is humid and receives heavy monsoon rainfall, so it is not a cold desert. The Malwa and Karnataka plateaus are peninsular regions with warmer seasonal conditions and do not combine all three clues—high-altitude cold desert, plateau setting and strong Trans-Himalayan rain shadow.

Correct answer: A. Kanchenjunga

The governing concept is the regional identification of important Indian mountain peaks. Kanchenjunga, also spelled Kangchenjunga, is a very high Himalayan peak associated with Sikkim and the Eastern Himalaya; therefore option A matches all three clues. Anamudi is the highest peak of the Western Ghats and lies in Kerala, so it does not fit the Himalayan clue. Guru Shikhar is the highest point of the Aravalli Range in Rajasthan, while Doddabetta belongs to the Nilgiri Hills of Tamil Nadu. The question is asking for geographical association rather than a calculation: Eastern Himalaya plus Sikkim leads unambiguously to Kanchenjunga.

Correct answer: A. Anamudi

The governing concept is the identification of Indian peaks by their physical region. Anamudi is located in Kerala in the Western Ghats and is generally recognised as the highest peak in South India, so option A satisfies every clue. Nanda Devi is a Himalayan peak in Uttarakhand, far north of Kerala. Guru Shikhar is situated in the Aravalli Range of Rajasthan, and Dhupgarh is the highest point of the Satpura Range in Madhya Pradesh. Thus the alternatives belong to different mountain systems. No numerical calculation is required; the correct method is to compare the stated state and range with the known location of each peak. Kerala plus Western Ghats is the decisive combination for Anamudi.

Correct answer: A. Nanda Devi

The governing concept is the geographical distribution of important Himalayan and peninsular peaks. Nanda Devi is a major Himalayan peak in Uttarakhand, so option A is the only choice matching both the state and the mountain system. Mahendragiri is associated with the Eastern Ghats in Odisha, Doddabetta is in the Nilgiri Hills of Tamil Nadu, and Guru Shikhar belongs to the Aravalli Range in Rajasthan. These alternatives may all be important Indian high points, but their locations disqualify them. The question gives two linked clues—Uttarakhand and Himalaya—and both point to Nanda Devi. Therefore the answer follows from regional identification, not from comparing exact elevations or performing a calculation.

Correct answer: A. Eastern Ghats

The governing concept is the contrast between the continuous Western Ghats and the discontinuous Eastern Ghats. The Eastern Ghats run along or near the eastern side of peninsular India and are broken into separate sections because major rivers such as the Mahanadi, Godavari, Krishna and Cauvery cross them. Hence option A fits both clues: an eastern-coast range and a river-cut, discontinuous structure. The Western Ghats are comparatively continuous and form a stronger western escarpment. Karakoram is a high mountain system in the far north, while Himadri is the highest and most northerly Himalayan division. The answer is therefore established by landform position and continuity, not by altitude.

Correct answer: A. North-central part of the Peninsular Plateau

The governing concept is the physiographic classification of India. The Malwa Plateau is a lava-based upland of central India, spread mainly across western Madhya Pradesh and adjoining Rajasthan. In the broad division of the Peninsular Plateau, it is placed in the north-central section, close to the Central Highlands. Therefore, option A is correct. Lakshadweep is a coral island group, Kashmir has high mountain and glacial landforms, and the eastern coast contains coastal plains and lagoons; none of these describes Malwa. Its location and plateau character, rather than climate or vegetation, provide the decisive clue.

Correct answer: B. Long-term erosion

The governing concept is geomorphic evolution through weathering and erosion. The Bundelkhand Plateau is an old, stable part of the Peninsular Plateau, built largely of hard crystalline rocks. Over a very long geological period, running water, weathering, and other erosional forces removed softer material and exposed the resistant rock surface. Thus option B correctly explains its rugged and eroded appearance. Coral growth belongs to shallow marine environments, glacial deposition is associated with glaciers and their sediments, and sea tides affect coasts rather than this inland plateau. The clue is the combination of ancient hard rock and prolonged denudation.

Correct answer: C. Relation with the sources of the Narmada and Son

The governing concept is a watershed, or a highland that separates the drainage basins of different rivers. Amarkantak, in the Maikal highlands of central India, is an important source region for the Narmada and the Son. The Narmada flows westward toward the Arabian Sea, while the Son ultimately joins the Ganga system, so the upland helps distinguish major drainage directions. Option C is therefore correct. A river delta mouth is a depositional end point, not a source; the Luni belongs to the arid western drainage region; and marine coral has no connection with an inland watershed.

Correct answer: D. Satpura

The governing concept is the regional grouping of mountain ranges. The Satpura system extends across central India and includes several associated hill sections. The Maikal Hills form the eastern continuation or associated part of the Satpura range, while the Mahadeo Hills are an important section near the central Satpura region. Hence option D is correct. The Eastern Ghats lie along parts of the eastern side of the Indian peninsula, the Aravalli system is mainly in north-western India, and the Karakoram belongs to the high trans-Himalayan region. Their locations and geological settings do not match these central Indian hills.

Correct answer: A. Orographic lifting of moist monsoon winds

The governing concept is orographic rainfall. Moisture-laden monsoon winds from the Bay of Bengal move toward the Khasi Hills. When the air encounters the elevated hills, it is forced to rise. Rising air expands and cools; water vapour then condenses into clouds and produces intense rainfall on the windward slopes. Therefore option A is correct. Glacial deposition is a landform-building process involving ice, lava flow is volcanic, and sandstorms are wind-driven events in arid regions. Cherrapunji and Mawsynram are famous examples of very heavy rainfall associated with this relief-controlled uplift.

Correct answer: B. They are north-eastern hill units of Purvanchal

The governing concept is the eastern continuation of the Himalayan mountain system, commonly called Purvanchal in north-eastern India. The Patkai, Naga, and Mizo Hills are folded hill ranges located along the country’s north-eastern border and are treated as important units of this regional system. Thus option B is correct. Deccan lava layers belong to the Peninsular Plateau, Aravalli does not consist of these north-eastern hills or sandy dunes, and the Ganga alluvial plain is a low depositional plain rather than a hill system. Their regional location is the decisive clue.

Correct answer: C. Cold and dry desert character

The governing concept is the combined effect of altitude and rain shadow. Ladakh lies at a high elevation north of the main Himalayan ranges. These ranges block much of the moisture-bearing monsoon air, so Ladakh receives very little precipitation. Its great height keeps temperatures low, while the limited moisture creates a dry environment. Therefore option C correctly describes Ladakh as a cold desert or cold, dry plateau. Marine humidity and coral reefs require warm, moist coastal seas, and the Ganga Delta is a low alluvial depositional region. None of those conditions exists in the high, rain-shadowed interior of Ladakh.

Correct answer: A. They are Central Indian subranges of the Satpura system

The governing concept is the classification of India’s relief divisions into mountain systems and their associated ranges. The Satpura system extends across parts of central India and includes or is closely associated with several hill units, including the Mahadeo Hills and the Maikal Hills. These landforms are made of elevated, rugged terrain and are not coastal depositional features or oceanic formations. Hence option A correctly describes their relationship. Eastern-coast deltas form where rivers deposit sediment near the sea; Himalayan glaciers are permanent or semi-permanent masses of moving ice at high altitude; and coral islands develop from marine organisms. None of those descriptions applies to Maikal and Mahadeo.

Correct answer: A. Orographic lifting of moist monsoon winds

The governing concept is orographic, or relief, rainfall. Moisture-laden monsoon winds from the Bay of Bengal encounter the Khasi Hills and are forced to rise along the slopes. As air rises, it expands and cools; cooling causes water vapour to condense into clouds, often producing intense rainfall on the windward side. This process explains the very heavy precipitation around Cherrapunji and Mawsynram in Meghalaya. Therefore, option A is correct. Lava flow is a volcanic process, glacial deposition requires moving ice and is not the controlling process here, and sand storms are dry-weather events associated with loose sediment. None of these can explain the Khasi Hills’ monsoon rainfall as directly as orographic lifting.

Correct answer: B. They are north-eastern hill units of Purvanchal

The governing concept is the eastern continuation of the Himalayan mountain system, commonly called the Purvanchal hills. After the Himalayas bend sharply toward the south in the far northeast, a series of folded and forested hill ranges continues along India’s eastern and north-eastern frontier. The Patkai, Naga, and Mizo Hills are important units of this Purvanchal group. Thus option B is correct. The Deccan lava layers belong to the volcanic plateau of peninsular India, Aravalli is an old mountain system rather than a source of these north-eastern hills, and the Ganga alluvial plain is a low depositional plain, not a rugged hill range.

Correct answer: C. Altitude and rain shadow

The governing concept is the effect of altitude and rain-shadow conditions on climate. Ladakh is a high plateau in the Trans-Himalayan region, so its air temperature remains low because temperature generally decreases with increasing elevation. At the same time, the high mountain ranges block much of the moisture-bearing monsoon winds, placing Ladakh in a rain-shadow zone. Limited precipitation, clear skies, and very cold winters together produce its cold-desert character. Therefore, option C is correct. Marine humidity and coastal plains describe lowland maritime settings, coral reefs and lagoons are marine landforms, and black soil with cotton is an agricultural association rather than a climatic explanation.