Mountains and Plateaus of India

The governing concept is the identification of regional hill systems within Peninsular India. Mahendragiri is a prominent peak associated with the Eastern Ghats in Odisha, while the Shevaroy Hills are an Eastern Ghats hill group in Tamil Nadu. Hence option A correctly places both names in the Eastern Ghats. The Aravalli system lies farther northwest and is a separate ancient range. Trans-Himalayan ranges belong to the high northern mountain region beyond or north of the main Himalaya, so they are unrelated to these southern hills. Black soil is a soil type, not a geographical mountain group, making option D a category error. The Eastern Ghats are discontinuous because several rivers cut through them.

The governing concept is orographic, or relief, rainfall. During the southwest monsoon, the Arabian Sea branch carries moisture toward the west coast of India. When these winds meet the steep western face of the Western Ghats, they are forced to rise. Rising air expands and cools; water vapour then condenses and produces heavy rainfall on the windward western slopes. Therefore, option A gives the correct cause. The Ganga does not form a delta on the Western Ghats, Himalayan snow does not directly account for this seasonal rainfall, and the Thar Desert is far to the northwest and is not the source of these moist winds. The eastern leeward side is comparatively drier.

The governing concept is plate tectonics and the formation of fold mountains. The Indian Plate moved northward and converged with the Eurasian Plate. Because the continental crust of both plates is relatively buoyant, it did not simply disappear into the mantle; instead, compression folded, faulted, and uplifted sediments and crustal material, producing the Himalayan mountain system. Thus option A is correct. Option B gives an oversimplified and incorrect description of the main process. Desert dunes are formed by wind deposition in arid environments, not by continental collision, so option C is unrelated. Coral islands develop from marine biological and geological processes in warm shallow seas, not from the collision that formed the Himalayas.

The governing concept is the relationship between geological parent rock and soil formation. Much of the Deccan Plateau is covered by basaltic lava flows associated with ancient volcanic activity, commonly called the Deccan Traps. Weathering of this basalt produced regur, or black cotton soil, which is clay-rich and can retain moisture. Therefore, option B is the correct association. The Meghalaya Plateau is mainly linked with ancient crystalline rocks and has a different regional setting. The Ladakh Plateau is a high, cold mountain plateau with distinct arid conditions, not the classic basalt-and-regur association. Bundelkhand contains mainly old crystalline rocks and does not represent the standard volcanic-lava and black-soil pair used in school geography.

The governing concept is the arrangement of central Indian relief and rift valleys. The Narmada flows westward through a structural trough, commonly described as a rift valley, located between the Vindhya Range to the north and the Satpura Range to the south. Therefore, option C correctly states its position. It is not east or west of both ranges, because the valley occupies the intervening zone between them. Option D is also incorrect: the Narmada basin is in central Peninsular India, not in the Himalayan region. The river eventually reaches the Arabian Sea, and its westward course is another useful geographical feature associated with this valley.

The governing concept is the contrast between the continuous Western Ghats and the discontinuous Eastern Ghats. The Eastern Ghats are older, lower, and more eroded, and major peninsular rivers such as the Mahanadi, Godavari, Krishna, and Kaveri cut across them on their way to the Bay of Bengal. River erosion and long geological denudation have therefore produced separated hill blocks rather than one continuous wall. Option A gives the most appropriate school-level explanation. Snow cover cannot explain their structure, because they are not permanently snow-covered high mountains. They are not submerged beneath the sea, and the Thar Desert is located in northwestern India, far from the Eastern Ghats.

The governing concept is the windward and leeward effect of a mountain barrier. The Arabian Sea branch of the southwest monsoon transports moisture toward the western coast. The Western Ghats stand across this path, so the moist air rises along their western, or windward, slope. As the air rises it cools, condensation increases, and substantial orographic rainfall occurs. Hence option B is correct. The Bay of Bengal is not the immediate source of the winds responsible for this west-coast pattern. Sandy winds from the Thar are dry and cannot explain heavy rain, while Himalayan glaciers are not a direct source of monsoon precipitation on the Western Ghats. The eastern side lies in a relative rain-shadow region.

The governing concept is the subdivision and continuity of the Peninsular Plateau. The Meghalaya Plateau is a northeastern extension of the ancient Peninsular block, but it appears separated from the main plateau region by the alluvial plains and the structural gap around the Ganga-Brahmaputra system. It includes important hill groups such as the Garo, Khasi, and Jaintia Hills. Therefore, option C gives the best explanation for calling it an isolated part. It is not directly attached to the Western Ghats, which are far to the southwest. It is not in the Thar Desert, and its geological identity is not that of a marine coral island. The term refers to its geographic separation, not to complete geological independence.

The Himalayas are conventionally divided into the Himadri, Himachal, and Shiwalik ranges. Himadri, also called the Great or Inner Himalaya, is the northernmost and highest division. It contains many of the tallest Himalayan peaks and remains snow-covered for long periods because of its great altitude. Thus option B, “highest snow-covered peaks,” correctly identifies its chief feature. Option A describes the Shiwalik range, which forms the low outer foothills. Sandy plateaus are not the defining landform of Himadri, and coastal marshes belong to low-lying coastal environments rather than a high mountain range. The answer follows from comparing altitude, position, and snow cover.

The governing concept is the longitudinal arrangement of the Himalayan ranges from north to south. The Shiwalik, or Outer Himalaya, lies on the southern margin of the Himalayan system and is the range closest to the northern plains. It is generally lower and geologically younger than the Himadri and Himachal ranges. Therefore, option A correctly explains why it is called the outer range. The Deccan Plateau, Western Ghats and Aravalli are separate physiographic units and do not define the Shiwalik. The word outer refers to its position at the Himalayan foothill edge, not to a sandy or coastal character.

The governing concept is the relationship between a plateau’s geological structure and its mineral resources. The Chota Nagpur Plateau, spread mainly across Jharkhand and adjoining areas, contains extensive deposits of coal, iron ore, mica, bauxite and other minerals. These resources support iron-and-steel plants, power generation and several heavy industries, which explains the expression mineral heartland. Therefore, option C is correct. Rice deltas are depositional lowlands, sea salt is associated with coastal environments, and coral islands are marine landforms; none explains the plateau’s economic and geological importance.

The governing concept is the location of the major hill systems of Peninsular India. The Nilgiri Hills are situated in southern India near the junction where the Western Ghats and Eastern Ghats meet. This elevated region includes important peaks such as Doddabetta and is associated with places such as Ooty. Hence, option A is correct. The Ganga Plain is a broad alluvial lowland, the Thar is a desert in north-western India, and Ladakh belongs to the Trans-Himalayan highland region. These locations cannot identify the Nilgiris, so the junction of the two Ghats is the decisive clue.

The governing concept is that surface drainage generally follows the slope of land. Much of the Deccan Plateau slopes eastward or south-eastward, so major east-flowing peninsular rivers such as the Godavari, Krishna and Cauvery move across the plateau and eventually enter the Bay of Bengal. Therefore, option A is correct. The word “many” is important: it does not claim that every river flows east, because the Narmada and Tapi flow west into the Arabian Sea. The other choices incorrectly deny Deccan rivers or assign them Himalayan origins.

Mountain relief provides evidence about geological history. A mountain system that has existed for a very long time is exposed repeatedly to weathering, running water, wind, and other erosional agents. These processes gradually lower peaks, widen valleys, and make slopes more rounded and irregular. The Aravalli Mountains show this worn-down and relatively low relief, so option A, their very old age, is correct. A newly formed glacial range would not normally display such prolonged erosion. The Aravallis are not identified as marine coral mountains, and a low eroded profile certainly does not prove complete snow cover. The conclusion comes from linking present landform appearance with the duration of erosion.

The governing concept is the regional classification of the northern mountain system. The Karakoram and Zanskar ranges lie in the high, cold mountain region north of the main Himalayan ranges and are commonly grouped with the Trans-Himalaya, especially the Ladakh region. Therefore, option B is correct. The Eastern Ghats and Satpura are separate peninsular hill systems, while the Malwa Plateau is a plateau region of central India. The dry climate, great elevation and location around Ladakh help distinguish these ranges from the lower and more humid mountain systems of peninsular India.

A gap or pass is a relatively low, open route through a mountain system. The Palghat Gap is a broad natural break in the Western Ghats of southern India, between the Nilgiri Hills and the Anaimalai Hills. Because it lowers the otherwise strong mountain barrier, it provides an important route between Kerala and Tamil Nadu and supports movement, transport, and communication. Therefore option A is correct. It is not a peak of the Aravallis, a glacier of the Himalayas, or a feature of the Ganga Delta. Those alternatives belong to different physical regions. Identifying both the landform and its position in the Western Ghats makes the answer unambiguous.

Anamudi is the highest peak of South India and is located in Kerala. It belongs to the southern Western Ghats, near the Eravikulam region. The governing idea is regional identification: a mountain peak should be associated with the range and state where it is physically situated. Hence option A is correct. The Aravalli Range is chiefly connected with Rajasthan and western India, not Kerala. The Shiwalik range forms the outer Himalaya in northern India, while the Meghalaya Plateau lies in the northeast. None of those regions contains Anamudi. Linking the peak’s location, mountain system, and state provides three consistent clues for selecting the first option.

The governing concept is the regional distribution of major Himalayan peaks. Kanchenjunga is a very high peak of the Eastern Himalaya and is closely associated with Sikkim on India’s north-eastern Himalayan frontier. Therefore, option A is correct. The Aravalli range lies in north-western India, the Deccan Plateau is a peninsular upland, and the Western Ghats run along the western side of the peninsula; none of these regions contains Kanchenjunga. Recognizing the peak’s association with Sikkim and the Eastern Himalaya is the key geographical clue.

The governing concept is a watershed, meaning a highland or divide from which drainage flows into different river systems. The Amarkantak Plateau is an important source region: the Narmada rises near Amarkantak and flows generally westward, while the Son originates in the same broad highland and flows eastward as a tributary system of the Ganga basin. This separation of drainage directions explains why option A is correct. The plateau is not merely a coastal site, as claimed in B; it is an inland highland. Option C incorrectly calls it a coral island, and D confuses it with a deltaic mouth. The key evidence is the origin and divergence of major rivers.

The governing concept is the identification of regional hill groups within India’s major mountain systems. The Maikal Hills form an eastern extension or associated section of the Satpura system, while the Mahadeo Hills are another important group within the Satpura ranges of central India. Therefore, option A correctly places both together. Option B is incorrect because the Eastern Ghats are a separate discontinuous range along eastern peninsular India. Option C misrepresents the Aravalli system and also changes hills into sandy dunes. Option D refers to glacial features of the high Karakoram, a trans-Himalayan region with a very different relief and climate. Their central Indian location and structural association make A the only suitable answer.

The governing concept is the effect of relief on monsoon rainfall. The Khasi Hills in Meghalaya lie in the path of moisture-laden winds from the Bay of Bengal. Their orientation and steep relief help force the air to rise, cool, and condense, producing exceptionally heavy orographic rainfall in nearby places such as Cherrapunji and Mawsynram. Thus option A is correct and connects the hills with one of India’s highest-rainfall zones. Option B is wrong because the Khasi Hills are not a completely glacial environment. Option C describes a soil-and-crop association found elsewhere, not the chief climatic importance of these hills. Option D refers to coral landforms, which are unrelated to the rainfall mechanism here.

The governing concept is the subdivision of the Himalayan and northeastern hill systems. The Purvanchal Hills are the eastern continuation of the Himalayas after the range bends sharply southward around the northeastern part of India. Important groups associated with this region include the Patkai, Naga, Mizo or Lushai, and related hills. Therefore, option A is correct. Option B lists major ranges of northern and central peninsular India, not the northeastern hills. Option C names hill groups of the southern Western Ghats and associated peninsular highlands. Option D lists plateau regions rather than a continuous northeastern hill group. The shared northeastern location and Himalayan continuation make the first group the only suitable answer.

The governing concept is the relationship between altitude, mountain barriers, and desert climate. Ladakh is a high plateau in the Trans-Himalayan region, situated in the rain-shadow zone of the Himalayas. The surrounding high ranges block much of the moisture-bearing monsoon winds, while the great altitude produces very low temperatures, especially in winter. As a result, Ladakh has a cold, dry high-desert environment, so option A is correct. Option B describes a humid coastal wetland, but Ladakh is landlocked and elevated. Option C refers to warm, wet lowland vegetation, which is unsuitable for its arid climate. Option D is a marine landform and cannot occur on this inland plateau.

The correct answer is the Nilgiri Hills. Ooty, officially Udhagamandalam, is a well-known hill station in Tamil Nadu, while Doddabetta is the highest peak of the Nilgiri range. The Nilgiris lie where the Western Ghats meet the Eastern Ghats in southern India. Therefore, both place names point to the same hill region. Dafla Hills and Mishmi Hills are associated with the northeastern Himalayan area, whereas Rajmahal Hills belong to eastern India. The governing idea is to identify important hill stations and peaks with their physical region; Ooty and Doddabetta are a standard Nilgiri pair.

The correct answer is the Palani Hills. Kodaikanal is a major hill station in Tamil Nadu and is situated in the Palani Hills, a prominent group of the southern Western Ghats. This location explains its elevated terrain, cool climate and distinctive montane environment. The Khasi Hills and Naga Hills are in northeastern India, while the Aravalli is an older mountain system extending through parts of northwestern and western India. The governing concept is regional association: a famous hill station is matched with the range in which it lies. Since Kodaikanal is linked specifically with the Palani Hills, option A is the only suitable answer.