Mountains and Plateaus of India

The correct answer is A. The Himalayas are young fold mountains formed when the northward-moving Indian Plate converged with the Eurasian Plate. Sediments deposited in the intervening Tethys Sea were compressed, folded, uplifted, and progressively raised into a major mountain system. This compression-and-folding process explains both the structure and the continuing tectonic activity of the Himalayas. The Deccan Trap resulted from extensive basaltic lava eruptions, not the formation of the Himalayas. The Aravalli is an ancient eroded range rather than a coastal feature, and the Eastern Ghats are not coral-built mountains. Plate convergence is therefore the decisive geological explanation.

The correct answer is B. The Deccan Trap was built by repeated, extensive eruptions of fluid basaltic lava. Each successive flow spread over large areas and later cooled into a separate basalt layer. Differential weathering and erosion of these nearly horizontal layers produced escarpments and a stair-step or terrace-like relief; the word “trap” is related to a stair-like appearance. Glacial erosion does not explain this vast volcanic plateau, coral reefs form in shallow marine environments, and Ganga alluvium belongs to a river-built plain. Therefore successive basaltic lava flows provide the correct geological basis for the Deccan Trap’s step-like landscape.

The correct answer is C. The Eastern Ghats are not a continuous wall because major peninsular rivers flowing generally eastward have cut across them on their way to the Bay of Bengal. The Mahanadi, Godavari, Krishna, and Cauvery river systems pass through or interrupt sections of the Eastern Ghats, producing a broken and discontinuous appearance. Narmada and Tapi are primarily west-flowing rivers, while Luni belongs to the arid north-west. The Indus tributaries are associated with the north-western Himalayan drainage, and Brahmaputra tributaries lie in the north-east. Hence the east-flowing peninsular river group in option C gives the relevant explanation.

The correct answer is D. The Narmada Valley occupies a long structural depression between the Vindhya Range to the north and the Satpura Range to the south. This depression is commonly identified as a rift valley, formed through tectonic faulting and downward displacement of a block of the Earth’s crust. The Narmada consequently flows westward through this linear valley before reaching the Arabian Sea. A delta is formed by deposition at a river mouth, coral growth occurs in suitable shallow marine waters, and a glacial trough is carved by moving ice. None of these explains the tectonic setting between Vindhya and Satpura.

The correct answer is A. During the southwest monsoon, moisture-laden winds from the Arabian Sea encounter the Western Ghats. The mountains force the air to rise; as it rises, it cools, condenses, and produces heavy orographic rainfall on the western, windward slope. After crossing the crest, the air has lost much of its moisture and descends toward the Deccan Plateau, creating a comparatively dry leeward region called the rain-shadow area. Glacial melt, snowfall, coral deposition, sea waves, sandstorms, and desertification do not explain this west-east rainfall contrast. The governing concept is therefore relief rainfall followed by a rain-shadow effect.

The correct answer is B. The Meghalaya Plateau, including the Garo, Khasi, and Jaintia Hills, is commonly regarded as a detached or separated north-eastern extension of the Peninsular Plateau. Its separation from the main plateau is associated with the faulted or lowered region near the Rajmahal–Garo gap, through which the Brahmaputra and related lowlands help distinguish the plateau block from the main peninsular surface. It is not a branch of the Aravalli, an outer Himalayan range, or a southern branch of the Western Ghats. The key structural clue is therefore its isolated position and geological connection with the ancient peninsular plateau.

The governing concept is the division of the Himalayas into parallel ranges. Himadri, also called the Great or Inner Himalaya, is the northernmost and highest main Himalayan range. Its great elevation keeps temperatures low, allowing snowfall to accumulate and form extensive glaciers. Therefore, the abundance of high peaks and glaciers is best explained by its status as the highest principal range, making option A correct. The Deccan Plateau is an old peninsular plateau, while the Eastern Ghats and Aravalli are separate, lower and geologically different mountain systems; none explains the characteristic features of Himadri.

Doon valleys are long, relatively level valleys located between the Shiwalik range and the Middle Himalaya, also called the Lesser Himalaya. They are formed in the longitudinal space between these two parallel mountain belts. The Shiwaliks form the outermost and generally lowest Himalayan range in the south, while the Middle Himalaya lies farther north and is higher. Dehradun is a well-known example of a Doon valley, which illustrates this spatial relationship.

To choose the answer, identify the two neighbouring Himalayan ranges that enclose a Doon valley. Option B names the Shiwalik and Middle Himalaya, so it matches the definition. The Himadri and Karakoram are much farther north and do not describe the usual location of Doon valleys. The Deccan Plateau, Eastern Ghats, Aravalli and Western Ghats belong to other parts of India and are not the paired ranges involved. Therefore option B is correct.

Iron and steel plants need large quantities of iron ore, coal, limestone, and other materials. These inputs are heavy and expensive to transport over long distances, while coal supplies the energy needed for processing. The Chota Nagpur Plateau and nearby regions have major deposits of iron ore and coal, along with other minerals and transport connections. Locating basic industries near these resources reduces the cost and difficulty of bringing raw materials to the plant.

Therefore, option B is correct: the important geographical reason is the proximity of mineral ores and coal. Coastal humidity and ports may help some industries, but they are not the main reason for this plateau’s iron and steel concentration. Glacial ice, coral reefs, and lagoons have no relevant connection with the required raw materials or energy supply.

The governing concept is the arrangement of the Peninsular Hills. The Nilgiri Hills occupy a significant meeting zone where the Western Ghats from the west and the Eastern Ghats from the east approach and connect in southern India. This position gives the Nilgiris strategic importance in understanding the division of the peninsular uplands. Therefore, option B is correct. The Aravalli and Vindhya ranges are located in northwestern and central India, Karakoram and Ladakh belong to the Trans-Himalayan region, and the Ganga-Brahmaputra plains are not a hill junction. Ooty and Doddabetta are useful associated examples.

The governing concept is that the general slope of land controls the direction of surface drainage. Much of the Deccan Plateau slopes eastward or southeastward from the Western Ghats. Consequently, major peninsular rivers such as the Godavari, Krishna, Mahanadi and Cauvery generally travel east and drain into the Bay of Bengal, often forming deltas. Option A is therefore correct. The word “most” is important because a few rivers, including the Narmada and Tapi, flow west through rift valleys into the Arabian Sea. The other options incorrectly claim that all rivers follow one impossible route.

The governing concept is the relationship between geological age, relief and denudation. The Aravalli range is one of the very old fold mountain systems of the Indian subcontinent. Over a very long period, weathering breaks rock into smaller particles and erosion removes that material through water, wind and gravity. Repeated denudation lowers and rounds the mountains, producing the highly eroded and discontinuous relief seen today. Therefore, option B is correct. Recent folding would normally produce younger, sharper relief, while coral formation and glacial deposition are specific processes that do not explain the broad character of the Aravallis.

The governing concept is the physical division of the Himalayan system into the Himalaya proper and the ranges lying beyond its main axis. The Trans-Himalaya lies north of the Great Himalaya and includes the Karakoram, Ladakh and Zanskar ranges. These high, cold mountain regions have distinctive arid landscapes and are separated from the lower Himalayan ranges by major valleys and plateaus. Hence option B is the correct identifying group. Sahyadri, Nilgiri and Palani belong to the Peninsular Hills; Vindhya, Satpura and Maikal are central Indian ranges; Garo, Khasi and Jaintia are hills of the Meghalaya region.

The governing concept is the role of gaps as natural breaks and transport corridors in mountain barriers. The Palghat Gap is a broad, relatively low discontinuity in the Western Ghats between the Nilgiri Hills to the north and the Anaimalai Hills to the south. It creates an important route between Kerala and Tamil Nadu, allowing movement of people, goods, roads and railways across the otherwise continuous escarpment. Therefore, option A is correct. It is not a Himalayan peak, a Meghalaya rainfall centre or an Aravalli mineral plateau; those choices describe unrelated regions or landforms.

The governing concept is the identification of important peaks within India’s physiographic divisions. Anamudi, also written Anamala or Anai Mudi, is located in Kerala and rises in the southern Western Ghats, within the Anaimalai Hills. At about 2,695 metres, it is the highest peak in the Western Ghats and peninsular India. Thus option B correctly places it in the relief structure of South India. The Eastern Ghats are a separate discontinuous system, the Aravalli lies far to the northwest, and the Meghalaya Plateau contains different hill groups; none of those alternatives identifies Anamudi.

The governing concept is the regional identification of major Himalayan peaks. Kanchenjunga is a giant peak of the Eastern Himalaya, situated on the boundary of Nepal and the Indian state of Sikkim. In Indian geography questions, it is therefore strongly associated with Sikkim and the eastern Himalayan sector. Option A is correct. The Aravalli range belongs mainly to northwestern India, Karnataka’s Western Ghats are a peninsular mountain system, and the Khasi Hills are part of the Meghalaya Plateau. These alternatives are not the mountain region or location associated with Kanchenjunga.

The correct answer is A, the Eastern Ghats. Mahendragiri, Shevaroy, and Javadi are separated hill sections belonging to the broader Eastern Ghats system. Unlike the relatively continuous Western Ghats, the Eastern Ghats are discontinuous because major rivers such as the Mahanadi, Godavari, Krishna, and Kaveri have cut across them on their way to the Bay of Bengal. This river dissection produces a broken chain of hills rather than one uninterrupted wall. The Aravalli and Karakoram are separate mountain systems, while the Western Ghats do not illustrate the specific discontinuity described in the question.

The correct answer is A. Rajmahal Hills and the Singhbhum Plateau belong to the old upland and mineral-bearing landscape of eastern India. Rajmahal is located in the northeastern part of present-day Jharkhand, while Singhbhum is a major plateau and mineral region in southern Jharkhand. Their geological setting is associated with ancient rocks, iron ore, coal and other mineral resources, and they are studied within the broader eastern Indian plateau framework, including the Chota Nagpur region. A coastal marsh, Lakshadweep coral formation, or Thar sandy plain has a completely different origin and relief, so none can describe both features.

The correct answer is A, the Vindhyan system. The Kaimur Range and Bhander Plateau are recognised as important components or associated units of the Vindhyan highlands in central India. The Vindhyan region extends across parts of Madhya Pradesh, Uttar Pradesh, Rajasthan and Bihar and is noted for its plateau surfaces, escarpments, sandstone formations, and layered sedimentary rocks. The Kaimur and Bhander sections help explain the broken plateau relief of this system. Nilgiri belongs to the southern Western Ghats, Karakoram is a high Himalayan range, and Lakshadweep is a coral island group, so these options are physically unrelated.

The correct answer is A. Dharwar and Singhbhum are parts of the ancient peninsular geological shield, formed from very old crystalline rocks and associated with valuable mineral resources. Dharwar rocks are prominent in Karnataka and adjoining areas, while Singhbhum is an important mineral belt of Jharkhand. Their ancient rocks help explain the presence of iron ore, manganese, gold, and other metallic minerals in the peninsula. They are not coral islands, because their origin is continental and crystalline; they are not Himalayan glaciers or young Ganga alluvium, both of which represent very different environments and ages.

The correct answer is A. The Balaghat and Harishchandra ranges are associated with the uplands and hill systems of the Deccan Plateau and the western peninsular part of India, particularly the Maharashtra region. They form part of the dissected plateau landscape, where elevated ridges, valleys, and escarpments have developed on the old peninsular surface. This setting differs fundamentally from Himalayan glacial terrain, the Garo Hills of Meghalaya, and the low-lying Ganga–Brahmaputra delta. The important examination link is therefore Balaghat and Harishchandra ranges → Maharashtra’s Deccan and western peninsular plateau environment.

The governing concept is orographic rainfall produced when moisture-bearing air is forced to rise over a mountain barrier. The Western Ghats are generally more continuous and higher than the discontinuous Eastern Ghats. When the southwest monsoon reaches the west coast, the Ghats compel moist Arabian Sea air to rise, cool and condense, producing substantial windward rainfall. Thus option A correctly connects continuity with a strong coastal barrier and wetter western slopes. The other options refer to unrelated processes: the Ganga Delta depends on river deposition, Thar expansion involves aridity and circulation, and Ladakh glaciers depend on high-altitude cold conditions rather than Western Ghats continuity.

The governing concept is the arrangement of the major hill groups in peninsular India. The Nilgiri Hills form an important highland around the meeting area of the Western and Eastern Ghats, while the Annamalai Hills are a prominent southern extension associated mainly with the Western Ghats. They are therefore both Ghats-related hill regions of South India, making option A the correct broad comparison. Option B places them in the Himalayas, which is geographically wrong. Options C and D confuse elevated hill systems with desert depositional landforms and river deltas, neither of which describes the Nilgiri or Annamalai Hills.

The governing concept is geological origin. The Himalayas are young fold mountains formed when the Indian Plate moved northward and compressed sedimentary layers against the Eurasian Plate. The Deccan Plateau, in contrast, is strongly associated with extensive basaltic lava flows that cooled and accumulated over geological time, producing the Deccan Trap landscape. Hence option A correctly contrasts compression-related mountain building with lava-related plateau formation. Option B assigns completely unsuitable coral and glacial origins. Option C reverses the accepted age and type: the Aravallis are among the ancient mountain systems, whereas the Himalayas are young fold mountains. Option D misidentifies both Ghats.

The correct answer is Kanchenjunga. It is a major peak of the Himalayan system and is strongly associated with Sikkim in Indian geography. The clue “Eastern Himalaya” separates it from peaks located in southern or northwestern India. 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 is a high peak of the Nilgiri Hills in Tamil Nadu. Therefore, the combination of Sikkim, the Eastern Himalaya, and a very high mountain peak uniquely identifies Kanchenjunga.